Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca4eb475221dbab…

MALICIOUS

PDF

67.6 KB Created: 2021-01-02 13:35:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41bb936c6ff3b53e0f13de8005a65763 SHA-1: d34c7ae909a1eed9c4817a42b9a18f4715751b2d SHA-256: 0ca4eb475221dbab3d2aad6d414527658dd0e9b0d6d846b5c2ae04403534d4b5
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. The 'PDF_IMAGE_LURE' heuristic indicates it's an image-based document with an action trigger, designed to resemble a screenshot. It contains multiple external links, including a 'PDF_SEO_LINK_FARM' heuristic firing, suggesting it's part of a link farm intended to drive traffic to other sites. The primary external URI points to 'https://trafftec.ru/aws?utm_term=core+10+steel+sheets', which is likely the initial lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7612

Heuristics 5

  • 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.
  • 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 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://trafftec.ru/aws?utm_term=core+10+steel+sheets
    • https://dutazimu.weebly.com/uploads/1/3/4/8/134878831/4988292.pdf
    • https://cdn-cms.f-static.net/uploads/4462073/normal_5fb82409ce369.pdf
    • https://cdn.sqhk.co/duxajoje/ibehchg/26_new_survival_maps_l4d2.pdf
    • https://cdn-cms.f-static.net/uploads/4405430/normal_5fa2fd5ed2e8f.pdf
    • https://cdn.sqhk.co/sukurorezib/ECQEjeZ/panda_bubble_shooter_free_game.pdf
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8ef74f913d7.pdf
    • https://cdn-cms.f-static.net/uploads/4389603/normal_5f9715106aaad.pdf
    • https://cdn-cms.f-static.net/uploads/4372074/normal_5f9d20fc3929d.pdf
    • https://verulezame.weebly.com/uploads/1/3/0/8/130814285/7028832.pdf
    • https://s3.amazonaws.com/wuzalugiseto/ipl_2019_schedule_cricbuzz.pdf
    • https://s3.amazonaws.com/tiluwisulepam/strategy_games_mod_apk.pdf
    • https://s3.amazonaws.com/gifiz/mawonokezusopavaxifejebo.pdf
    • https://s3.amazonaws.com/minegikukovel/24477433254.pdf
    • https://s3.amazonaws.com/jimugivos/9704430570.pdf
    • https://s3.amazonaws.com/bededuxotulapil/cool_math_games_the_sun_for_the_vampire_2.pdf
    • https://s3.amazonaws.com/kelageketisefuv/lenopigimedejene.pdf

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