Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a6575258d1c043e…

MALICIOUS

PDF

21.3 KB Created: 2020-04-09 04:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 00d649622dec8c9070106e906c3657b8 SHA-1: 5773f49a1106a707e627e3d4634e6b6d0cbb1c35 SHA-256: 1a6575258d1c043e60155a58a78b6e98b38d92c92210ad69918726801c03954b
112 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF is identified as malicious by an ML classifier and exhibits characteristics of a phishing lure, including a single image and a click-outward action. The document body contains multiple embedded URLs, suggesting a link farm designed to redirect users to potentially malicious content. The primary URL, http://kristinewordslayer.com/uploads/1/3/1/4/131437554/131437554.html#miss+spider%27s+sunny+patch+friends+white+bug, is likely the initial point of contact for the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 4

  • 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.
  • 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 21 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 http://kristinewordslayer.com/uploads/1/3/1/4/131437554/131437554.html#miss+spider%27s+sunny+patch+friends+white+bug
    • http://archinterface.net/uploads/1/3/1/4/131454102/ac782b5cb1eafe2.pdf
    • http://barspyder.com/uploads/1/3/0/6/130604820/momosituz_bejawavore_kofebaxeveta.pdf
    • http://moveconnected.com/uploads/1/3/0/7/130738778/5489228.pdf
    • http://fermemaillet.com/uploads/1/3/0/4/130489527/6d67e522b35eb.pdf
    • http://riseupgroup.net/uploads/1/3/0/5/130588511/kanobufem.pdf
    • http://bradrichmond.net/uploads/1/3/1/3/131381761/dabewepo.pdf
    • http://afitempdomain3.com/uploads/1/3/0/7/130739802/926678.pdf
    • http://greateristar.org/uploads/1/3/0/5/130551618/rozujowewes.pdf
    • http://dayafterdayafterday.com/uploads/1/3/0/7/130775845/7bd4f3c9a98.pdf

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