Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4951cc96cceb789…

MALICIOUS

PDF

15.9 KB Created: 2020-03-26 05:54:40 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e36be28567d675aa8e2e138a1edcb20c SHA-1: 9e0172495ce6cff2ba535621cbc2040cd7d08664 SHA-256: c4951cc96cceb789883084f9ce3ecba6d2465ab2595df81cf02802e3138cb5aa
112 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document is identified as a screenshot lure, designed to trick users into clicking embedded links. The document contains numerous external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The primary heuristic indicates an image-only document with an action trigger, typical of phishing lures. The ML classifier also flagged this as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9578

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 15 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://wagyuhcs.com/uploads/1/3/0/5/130551343/130551343.html#rosario+de+la+liberacion+padre+moises+larraga
    • http://dalecullis.com/uploads/1/3/0/7/130740019/vuxatenuxuribibo.pdf
    • http://christinalozanofier.com/uploads/1/3/0/5/130544230/xidaju_vasakibevato_veveluvame.pdf
    • http://erismetalltd.com/uploads/1/3/0/7/130776185/2236223.pdf
    • http://curiodigs.com/uploads/1/3/0/5/130543169/879771.pdf
    • http://thefirstandforemost.com/uploads/1/3/0/5/130543552/2042690.pdf
    • http://yacsur.net/uploads/1/3/0/4/130490115/manim_wokatigovovezo_sinadunaf_xewebinatiniv.pdf
    • http://gel8otto.com/uploads/1/3/0/6/130605156/vewebixitu.pdf
    • http://kreativekups.com/uploads/1/3/0/5/130539102/6800663.pdf

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