Malicious PDF — malware analysis report

Static analysis result for SHA-256 796ae28adce3e9f4…

MALICIOUS

PDF

148.7 KB Created: 2021-04-20 03:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b8ec2cd9de15437f1248db16cbb5ed94 SHA-1: e6d6d30865bf6af00709fe4672f33468a80ed279 SHA-256: 796ae28adce3e9f4d07817016d080aa70173ac1f9f544f40eff6f24b3eb00223
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 0.8347

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=d%2526d+wizard+spells+level+1 PDF link annotation
    • https://falukanujenujo.weebly.com/uploads/1/3/2/8/132815213/3004688.pdfIn PDF document text
    • https://luxovozudenez.weebly.com/uploads/1/3/4/1/134108910/430081.pdfIn PDF document text
    • https://fuvekusegubo.weebly.com/uploads/1/3/4/7/134736786/zekudemolozabof-xibafokozagavuk-zogen-pafatozezogud.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/iXk1iip/baby_girl_name_generator_online.pdfIn PDF document text
    • https://sefaxamijewosaw.weebly.com/uploads/1/3/2/6/132682716/lefat_femilazetudi_mosolebubaf.pdfIn PDF document text
    • http://movivulubelis.22web.org/is_the_jbl_charge_4_better_than_the_flip_5.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/a7jhHih/36651999470.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/jY40ipl/drift_trike_for_sale_motorized.pdfIn PDF document text
    • http://wavarev.22web.org/dujizuxoriwaf.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/deU83je/racing_download_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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.indictrans.orgIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd5255a-c5e5-4c10-8c09-1f94c32e884d/algebra_lineal_matriz_cambio_de_base.pdfIn PDF document text
    • http://vuvugifew.rf.gd/steel_magnolias_film_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e01a648-6751-482b-9904-19bd27b26e9f/95583984739.pdfIn PDF document text
    • http://bilovero.rf.gd/nufisemunezosofe.pdfIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_7bc1b23e24cb4f12bfafd2a9cc2dc90e.pdf?index=trueIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_8bad4c5e45104bac94464c7dabdb2331.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e343966-6797-4c1f-a3cb-10e7609cb078/97805748358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2e1f1be-bdd2-425e-a4b1-64b4657e32ce/59430213288.pdfIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_322b13ac7b7644fbb7c70f05e8cad4ec.pdf?index=trueIn PDF document text
    • http://metologedafux.epizy.com/bonabuxebekisike.pdfIn PDF document text
    • http://sufapasikan.epizy.com/apowersoft_audio_device_android.pdfIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_fdf663908fb847df96563953cbd5a21a.pdf?index=trueIn PDF document text
    • http://xumixuwe.epizy.com/anthropometric_definition.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn 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
    +3 more URL(s)

Extracted artifacts 17

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_016_off0001ffec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1FFEC 19380 bytes
SHA-256: fe2a5b1e0db069a79176a433911fc1acc1f90a34d8006d0dff9401b5cf05df50
font_00_sfnt_off00010f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7D 7916 bytes
SHA-256: b6d8f72b59c47e884b0b6746a25c5cbd96eb494928042fd8f7d2b0ad088f297a
font_01_sfnt_off000123dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123DC 8368 bytes
SHA-256: 11a70e4511db029bc81d6cfccb293e860fb34fd879bcd24a12bea0c573581572
font_02_sfnt_off00014047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14047 4156 bytes
SHA-256: 278cac2e78d1b4950b7c4295bc4000fde350c7c8fc6a349bfdf9917f5098d62c
font_03_sfnt_off00014e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E72 2656 bytes
SHA-256: 1620336da6018abf771a3b64a4739dbc5cc5761e5bcfd31f9568e9163b5e6178
font_04_sfnt_off00015977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15977 4140 bytes
SHA-256: b7882c459d94d9fb05ee491b72d0ee9c35e8d4bc9ed5787c7a0b3ba78fd6bc86
font_05_sfnt_off00016695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16695 3048 bytes
SHA-256: e23308bb06bff427f4fe2d795198e016b2e9db23d45fd702446b15ef1a1323d1
font_06_sfnt_off0001729b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1729B 4544 bytes
SHA-256: 059070cd149d8977ca78cfd4fb95e986a02e671cdb4f7bc81c5301fc7fc55836
font_07_sfnt_off000180a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180A2 2328 bytes
SHA-256: 6d897259d7ab9db79b0dbb16904cd99ff486aa7f4a475590a5d3e44eab6e0eed
font_08_sfnt_off00018b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B63 2604 bytes
SHA-256: d4cda5a9ecb2558448f754249352cd4d73a8f7efff03060ee9a54ebf713292d1
font_09_sfnt_off00019683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19683 2108 bytes
SHA-256: b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b
font_10_sfnt_off0001a022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A022 3840 bytes
SHA-256: 869700f7b438b0b0f23cfbf3a170597ae1a6b01e9ba9f60fe7298d5eefb98f81
font_11_sfnt_off0001ae3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE3A 4336 bytes
SHA-256: 87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284
font_12_sfnt_off0001bbda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBDA 6148 bytes
SHA-256: 0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207
font_13_sfnt_off0001cbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBC4 18068 bytes
SHA-256: b35fdc78f29138b86f034bf547dcde46d7a609680ba05e476fcbd5bdffa52f6a
font_15_sfnt_off00022159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22159 3612 bytes
SHA-256: 59ba68889a6ddfc00e7c371aa63d253c82c2fd60b6adad43b7b5c23629b027ac
font_16_sfnt_off00022f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22F79 4216 bytes
SHA-256: a1cdd12e7202d5b84db6fb10a0d71bc51fe40057a00e34d9df4032cbf4e7d52e

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