Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a8530076a6af43…

MALICIOUS

PDF

173.4 KB Created: 2021-04-08 06:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d1fdbdd5aa5b792d0aea52c3ba5540ea SHA-1: 0e19eb708347563c3abe2b545e3755cfcc767028 SHA-256: 06a8530076a6af43d728113687655c4642acc214e956324078002dc40e7adcaf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a primary focus on a link to 'maypoin.ru'. This URL, combined with the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic, strongly suggests a phishing or malicious redirection attempt. The ML classifier and ClamAV detection further confirm the malicious nature of the file, indicating it's likely a phishing trojan designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://maypoin.ru/strik?utm_term=what+is+whip+mean+in+slang PDF link annotation
    • https://nuwuzeparagagux.weebly.com/uploads/1/3/4/8/134883197/babujas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425504/normal_602d76787d810.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/dudunowebubevo.pdfIn PDF document text
    • http://qrastenmap.online/gb_whatsapp_transparent_latest_version_apkvzn4q.pdfIn PDF document text
    • http://qqkaxes.xyz/ps3_oblivion_modsuliix.pdfIn PDF document text
    • http://zitalogeloluwiw.mygamesonline.org/che_guevara_biography_download.pdfIn PDF document text
    • https://mevukufidax.weebly.com/uploads/1/3/1/3/131379039/guluwewete.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/86783509226.pdfIn PDF document text
    • http://vidclips.design/lamexezez0cf6a.pdfIn PDF document text
    • http://metryck.info/lunenimuwafuxexivinupiuhw0x.pdfIn PDF document text
    • http://nosinoski.shop/zebabasvu3g4.pdfIn PDF document text
    • https://pebuzifidam.weebly.com/uploads/1/3/2/8/132815752/1035332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490125/normal_60197ab94ca40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401703/normal_604b6aa276014.pdfIn PDF document text
    • https://feravenokitaj.weebly.com/uploads/1/3/6/0/136095553/durejusupojaz.pdfIn PDF document text
    • http://www.opentle.orgIn 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
    • https://s3.amazonaws.com/susonanezaj/kotijewadetukagod.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/google_maps_street_view_mobile_app.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/kai_sa_jungle_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/hp_officejet_6700_general_printer_error.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001ebf7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1EBF7 12708 bytes
SHA-256: 674e2aae59112e75c170d176a0749bf566334e5f74293ad3a4a544e0236c0087
stream_006_off00025f17.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x25F17 29580 bytes
SHA-256: ebac30849aa0a47ab84f4d525a1080e27d24a096b767f2ce9e90abe894296b17
font_00_sfnt_off00016c23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C23 35160 bytes
SHA-256: 255ae331e28781cf221346225729fbc27c9c85fa035ece6597c9d58057fec084
font_01_sfnt_off0001da33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DA33 5244 bytes
SHA-256: 9b4aeb5e19a6d6f64fb608226b52061e8e3a3747c17d2c21aacf92dad9060db5
font_03_sfnt_off00021021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21021 30708 bytes
SHA-256: 9a96cbf308987757ecee7cadaed8bf38589f657f98a871e05eade60b902638ab
font_05_sfnt_off000292af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x292AF 5792 bytes
SHA-256: 41e8cb250785da7651ef66653c7f2b2c2bd5562939df22f99961a3b024d30ec7