Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b278fe2ad635cd…

MALICIOUS

PDF

56.7 KB Created: 2021-05-05 21:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7978d4056b72753b3a832b011d3594dd SHA-1: 1b7b5c1f026563ade955df6dcf0d58664de2fa9a SHA-256: b7b278fe2ad635cd33e670aa0ac1b7335505759c240df4dd3cb2991c01e6518e
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-only content, and embedded external links. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a URL related to making beef jerky, suggesting a deceptive pretext. The presence of numerous disposable domains and external URLs indicates a likely attempt to redirect users to malicious sites for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6719

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 56 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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=how+to+make+beef+jerky+sticks+in+a+dehydrator
    • http://prizinsta.info/99887936365xsc4m.pdf
    • https://cdn.sqhk.co/jidevumedure/hdWjiZH/63913091132.pdf
    • http://fitit.space/gyproc_habito_board_data_sheetd91v6.pdf
    • http://voiprormul.xyz/mosezonetoxamo5d6lz.pdf
    • http://italysummer.fun/99943495735t2o85.pdf
    • http://copyright-help-report.com/71712714141qarrj.pdf
    • http://venira.su/dezaxamznnnh.pdf
    • http://kinokaiff.space/tizidevetakomokorasozegbsoof.pdf
    • http://barberking.best/94042405344g4qw6.pdf
    • http://sodaapp.pro/53822457805tqbdj.pdf
    • http://pc-remont.website/stihl_concrete_saw_ts420_water_attachmentackmb.pdf
    • https://cdn.sqhk.co/xetilibul/jRwtMjb/archero_co_op_mode.pdf
    • http://lishop.site/zikaxopopnbqv.pdf
    • http://dehydratedoriginalgoodness.com/off_season_soccer_workout_routinektl8w.pdf
    • http://zerkalo-fugicar.website/ielts_latest_essay_topics_with_answers_20196edoe.pdf
    • https://s3.amazonaws.com/fokapikow/tobusipubalusasurakamizo.pdf
    • https://s3.amazonaws.com/wejuvono/guzonatitog.pdf

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