Malicious PDF — malware analysis report

Static analysis result for SHA-256 f906a0c4849d9f47…

MALICIOUS

PDF

38.1 KB Created: 2021-10-10 12:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8f87fe4d911debfff5660737c233adb7 SHA-1: 4f650cfb5cd8da9c33443a3d2b9ad2c17cfdcb9e SHA-256: f906a0c4849d9f4793eb1029e1e1e25186e467c01eed86a305c53f7089b58603
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing multiple external URIs. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links, some using UTM parameters, suggests an attempt to redirect users to potentially malicious websites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8144

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 38 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://crysiq.ru/uplcv?utm_term=double+two+hearted+abv PDF link annotation
    • http://4998horo.gmmwireless.com/contents/files/josadi.pdfIn PDF document text
    • http://baominhlabors.com/upload/files/nifiruretejulija.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/xuganezimevibajorulux.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/56503955706.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/1ea1442fc3c936a5f9eae95eb604f5a3/28326329684.pdfIn PDF document text
    • http://xhslsh.gdx.cn/ckfinder/userfiles/files/44980118715.pdfIn PDF document text
    • https://tdfstore.it/file/xorulusasime.pdfIn PDF document text
    • https://www.nissan-utilitaires-melun.fr/ckfinder/userfiles/files/butudulesutagokoke.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/6970724017.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/lurenuwukapuz.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109210620116487.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/e20e10ea48b225831070cc8448f4bec6/1449217156.pdfIn PDF document text

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