Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fef8422cd5d6085…

MALICIOUS

PDF

76.9 KB Created: 2021-02-12 21:28:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c9c027846c4ee995c15f65b293930ab2 SHA-1: a3b2c591662c3b2d6ab83e09a120114f01bb64f8 SHA-256: 0fef8422cd5d608550d8098654bad4c2bc42d4e9db527c424c71ea8a1c28baf6
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to other PDF documents, suggesting a link farm or SEO manipulation tactic. One of the primary URLs identified is 'https://seumenha.ru/wix?keyword=panel+data+models+and+factor+analysis', which likely serves as a gateway to the other linked resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=panel+data+models+and+factor+analysis PDF link annotation
    • https://cdn.sqhk.co/fuvonazavo/1gdE4gg/87279200196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_600dce5049590.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/ygegcgj/blockchain_companies_in_atlanta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448536/normal_6012de1ab6591.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373271/normal_6006d0574c4ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373755/normal_5fcdb0ec23c71.pdfIn PDF document text
    • https://cdn.sqhk.co/xexegapimuwi/A8hbBgi/78222462180.pdfIn PDF document text
    • https://cdn.sqhk.co/ludibipimilu/2Bhc5MQ/cyber_hunter_hack_version.pdfIn PDF document text
    • https://cdn.sqhk.co/pasivuzuke/ghgghg2/best_mame_gun_games.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/Zoihjw0/13206282283.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/gjBiiid/wall_mounted_basket_storage_unit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393179/normal_5fef5fbd2aaeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393369/normal_60035f5b427c1.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/Ehhwjhu/apple_watch_5_yellow_leather_band.pdfIn PDF document text
    • https://cdn.sqhk.co/tazakabebilo/d3ifqMm/download_subway_simulator_3d_pc.pdfIn PDF document text
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/mafofolasasel-nafiwenogelonem.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/ghKhbij/17608165554.pdfIn PDF document text
    • https://cdn.sqhk.co/sukurorezib/P3gfs8O/nirus.pdfIn PDF document text
    • https://cdn.sqhk.co/niwonosorude/hhcAJRt/blockchain_wallet_bitcoin_mining.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/hEhaqeu/61416244799.pdfIn PDF document text
    • https://cdn.sqhk.co/butiluluvuk/IBighjd/game_development_courses_coursera.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459796/normal_6007e65f70fc3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FD 5056 bytes
SHA-256: 65948f39df8edeefb78c1a7c2b835e0697ea9ace674114bf435220f12de1f943
font_01_sfnt_off0000f415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF415 10456 bytes
SHA-256: 295ff137e605ec1ebafa991a6e933cbc3e4beacd351463a88147ac2bf4b30acb
font_02_sfnt_off000117c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117C2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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