Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7261f6231d794e3…

MALICIOUS

PDF

155.0 KB Created: 2021-04-08 07:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 02b57df8f7f41c28535bc00e09c5cf9c SHA-1: e4dc4a4c4b534337584f0f22bad3ca153fcd6dbf SHA-256: b7261f6231d794e34bd088618ccc99cff52f55c095a70c4e9e8662959f6f2722
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7718

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://midufefew.ru/123?utm_term=d%2526+d+blank+character+sheet+5e+pdf PDF link annotation
    • https://cdn.sqhk.co/gibuzini/Wvihc7Y/ice_galaxy_s7.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/dE7aq0z/amazon_kindle_account_login_uk.pdfIn PDF document text
    • http://pebonemariv.mypressonline.com/wagoresexipokopigaki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446259/normal_5fc80cc7dea56.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/english_words_with_meaning_and_sentences.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490265/normal_5fcb19c8b54d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372377/normal_5ff4507668007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448740/normal_6054b1b5ca819.pdfIn PDF document text
    • http://ponaxamewimenul.sportsontheweb.net/27215836162.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/nenakagimojapofokakudaseg.pdfIn PDF document text
    • https://cdn.sqhk.co/fukefipemuw/7igjh7r/70281779041.pdfIn PDF document text
    • http://bagezokazuraw.medianewsonline.com/gubojozigome.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.indictrans.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/6122e334-fd39-423b-84d2-b8a004a002d0/samsung_smartcare_vrt_plus_washer_ub_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd45e59-eca3-46f0-a8cc-2a4aa4a7c790/dekas.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/giwopalex.pdfIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/excel_advanced_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b43fcec-ece7-4825-b1aa-85f4738ae7f0/xizuwuxetibulava.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/apology_letter_format_to_lecturer.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/jegejenavigujiv.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/zogakigazuxewavi.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/widesixidiwekusewakawuva.pdfIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/bigapozu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    +3 more URL(s)

Extracted artifacts 20

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off00017b58.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17B58 6504 bytes
SHA-256: 24360cdb7014ada8aa5e6f1d3277a2d71ef7b6d1dc3bf288ea9a040c472e669a
stream_012_off0001a36f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A36F 19776 bytes
SHA-256: 43362295f894148e405c6539218e61be67a6fdb0027c7cb3b9fd0a9ce4e39e6b
font_00_sfnt_off0000ef3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3C 6148 bytes
SHA-256: 149738eb3e1d0bfb4a5732e89a115965e6f0cf3fc4971c694d3ce3619176544d
font_01_sfnt_off0000ff1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1C 3612 bytes
SHA-256: f0a2204899d1e3318a6bd81c872bf71f9687a1eb2abd97e43f363b8beb464341
font_02_sfnt_off00010d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D32 24280 bytes
SHA-256: 44b7b79a86d16bd577d68b0ee8ea610d63a2275bb6a0fcbaf7b2c4b2a3181307
font_03_sfnt_off00014dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DFA 3484 bytes
SHA-256: 6d180028f71bbfcf2b8105938643ee3a2a1c409b0c980e92ec88398b70d34608
font_04_sfnt_off00015965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15965 2604 bytes
SHA-256: 0e4b190990c22158f359a0de2485c61736e93a484cfb226f63bccb9bc1da1b2f
font_05_sfnt_off00016474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16474 3048 bytes
SHA-256: 2f58f42410b60611991c12283e964e03297a95500ca09b14f4d605296bc50bc4
font_06_sfnt_off00017085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17085 2656 bytes
SHA-256: dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5
font_08_sfnt_off00018c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C01 6808 bytes
SHA-256: e24778ca48d346af32d3a60b663129eae56597141c05f1b9180b0a902fcf5995
font_10_sfnt_off0001c61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C61A 6280 bytes
SHA-256: 9b26e63dddb061148d2096f8a3abd9ddbfbe7663dcfe2e6edc24d1b84c1ba01d
font_11_sfnt_off0001d553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D553 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
font_12_sfnt_off0001e359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E359 4140 bytes
SHA-256: 7073f777ec002e82a856420936458262fa3cc3b4ee0437ed56f01fa51c4379d2
font_13_sfnt_off0001f04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F04A 3840 bytes
SHA-256: 5b8e8035f8940535bfb5f3d78de7d5c45dbc51c905faa5d9788b8fc152e96872
font_14_sfnt_off0001fe5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FE5D 4544 bytes
SHA-256: 53570b1addc227c644bcbe5fafcce3e1ca8a5779b7722260ef5244079f464722
font_15_sfnt_off00020c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20C6B 2108 bytes
SHA-256: d117309382da938f7dffedc42f90dd4217b4d540d75629b80669d975ecbc171e
font_16_sfnt_off00021649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21649 4336 bytes
SHA-256: 87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284
font_17_sfnt_off000223f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x223F3 4216 bytes
SHA-256: cf1f64e2e40b673e905a7144f0f78914353b51ead6a82b3d8aeaa2f16fa670a9
font_18_sfnt_off000231b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x231B0 9084 bytes
SHA-256: 097afe6f0ec706a032bd277d3978562bd9c5cff78b19eaccc7c06e61a6992788
font_19_sfnt_off00024a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24A22 2328 bytes
SHA-256: 864cbe2c6973b44d2b71e19ffbffb2328dcb3759b07ceb43c11d5a372fc4956d

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