Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d5a2def9c4aad3…

MALICIOUS

PDF

41.6 KB Created: 2021-03-22 21:20:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c16df95b4892bede3ce8057d893c448 SHA-1: ea56dd826bee85353ee139b8dd0ebc352abcb45f SHA-256: e1d5a2def9c4aad38e5f09230e804637e9836823dafc7bbd0222406e5b00a7b4
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and embedded clickable link. The heuristic 'PDF_IMAGE_LURE' indicates a common tactic where a screenshot is used to hide malicious links. Multiple external URLs were extracted, with 'https://crophysi.ru/aws?utm_term=how+to+use+keurig+universal+filter' being a primary indicator of a potential phishing or download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8206

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 41 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://crophysi.ru/aws?utm_term=how+to+use+keurig+universal+filter
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    • https://dipafasimabake.weebly.com/uploads/1/3/1/1/131164320/ac912.pdf
    • http://pidagenavuziw.mywebcommunity.org/5813416846.pdf
    • https://cdn.sqhk.co/sevafeluba/jgRggNC/nails_2000_hudson_nh.pdf
    • http://xapowuxif.mywebcommunity.org/20765776482.pdf
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    • https://uploads.strikinglycdn.com/files/615c9a72-26c2-4737-8b86-a4a7e5f46953/47709983206.pdf