Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6a5ec4acf55e79b…

MALICIOUS

PDF

14.2 KB Created: 2020-05-14 05:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e58fb1d3299fd86a98281ce197cafd7b SHA-1: 6b29fe6c9803aeb87eec4cdd60f8b39137b9ff19 SHA-256: f6a5ec4acf55e79b06c0ffd480e170ca22128e6341a534cf5f9529d4397b7352
112 Risk Score

Malware Insights

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

The PDF document is identified as an image-only lure, typical for phishing campaigns. It contains numerous external links, many pointing to PDF files hosted on various domains, suggesting a link farm designed to distribute malicious content or host phishing pages. The ML classifier strongly indicates maliciousness, and the presence of multiple suspicious URLs reinforces this assessment. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 14 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://watsonsroofingrepair.com/uploads/1/3/1/3/131384156/131384156.html#excel+spreadsheet+not+full+screen
    • http://libertylogisticscenter1.com/uploads/1/3/0/4/130475959/kegilap.pdf
    • http://oldcustomhouseblythburgh.com/uploads/1/3/1/4/131437815/limivedes.pdf
    • http://annepetraro.com/uploads/1/3/1/4/131453247/e691d83ec5.pdf
    • http://cnccutting.lv/uploads/1/3/0/5/130539458/3385042.pdf
    • http://offcentervt.org/uploads/1/3/0/6/130604805/2272811.pdf
    • http://instalacijejazbinsek.net/uploads/1/3/0/7/130776460/tekofomowiw_givegekuzuf.pdf
    • http://6502.fun/uploads/1/3/0/5/130551576/2485623.pdf
    • http://stylistpotlight.com/uploads/1/3/0/7/130776402/wuwozodizu.pdf
    • http://reneseptic.com/uploads/1/3/0/7/130740401/5f0e2f2e3779.pdf

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