Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b81ea31d20a80e…

MALICIOUS

PDF

48.6 KB Created: 2021-03-21 22:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05874f33746daeb358dc88d3749f50cf SHA-1: 7c46ad92d661178c0a9f20b0beaed1d38779ffdc SHA-256: f2b81ea31d20a80e5378203c4f9a906a69671d17434a64cac996ea451ba95af4
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ClamAV and ML classifiers, and heuristics indicate it's an image-only lure designed to trick users. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary purpose appears to be directing users to external URLs, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8020

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 48 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://seumenha.ru/aws?utm_term=the+bookshop+of+yesterdays+movie
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    • https://cdn.sqhk.co/lupokuna/grZthbQ/russian_rider_online_mod_apk.pdf
    • http://tinesemexogo.mygamesonline.org/33289648445.pdf
    • http://rivilidopu.medianewsonline.com/ariens_st724_snowblower_owners_manual.pdf
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    • https://d926c97b-7f3b-4ec8-a52a-318bcb589338.filesusr.com/ugd/120f26_fb34b3eb69884482a602c424e89c3f63.pdf?index=true
    • http://famirasavu.epizy.com/yawara_stick_self_defense_techniques.pdf
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    • http://tuxabatadifu.onlinewebshop.net/funinegimetimegejusipubu.pdf
    • https://s3.amazonaws.com/desekusoxi/cpa_canada_salary_report.pdf
    • https://92ddf5cc-4ce7-4caf-b117-8241c553a727.filesusr.com/ugd/42bae0_6e5367e5d2c5405485ba76ef68447e11.pdf?index=true
    • https://s3.amazonaws.com/wovigebi/rugixapin.pdf
    • https://s3.amazonaws.com/ximupuv/9179609887.pdf
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    • http://taberadajip.atwebpages.com/pdf_file_unlock_to_print.pdf

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