Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e85dd7e7fd8bce1…

MALICIOUS

PDF

17.9 KB Created: 2020-04-02 16:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dc0d56da4c6106e3a61455117b48dcab SHA-1: 721b705f2026bd4d499d3db847751a1877d802e6 SHA-256: 5e85dd7e7fd8bce1f3f4f29f1aa8d970c71c10e8d54a94908d347029dd108791
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical of phishing campaigns, designed to trick users into clicking embedded links. The document contains a large number of external links, many pointing to PDF files, suggesting a link farm or a method to obscure the final malicious destination. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 17 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://biol343k10.com/uploads/1/3/0/4/130476563/130476563.html#community+public+health+nursing+9th
    • http://hito-sports.com/uploads/1/3/0/6/130622059/20123c933d.pdf
    • http://prolabsau.com/uploads/1/3/0/4/130483869/rixeboxusepa.pdf
    • http://tsfvoyages.net/uploads/1/3/0/7/130740502/615145.pdf
    • http://blackriverkayaking.com/uploads/1/3/1/3/131383478/5392074.pdf
    • http://mrandmrsband3.com/uploads/1/3/0/9/130969680/kiriron_mozutinonubo_nuwagubafipe_sizafaninufob.pdf
    • http://zotix.net/uploads/1/3/0/5/130590224/diwumasotosajama.pdf
    • http://janeyogaweb.com/uploads/1/3/0/5/130588640/denagafijiromexa.pdf
    • http://thecrowelycompany.com/uploads/1/3/1/3/131380436/bca7f8fe82c6.pdf
    • http://michiganautoinjurylaw.com/uploads/1/3/0/6/130621102/d7325ebab289aa.pdf
    • http://whatdoyoutake.com/uploads/1/3/0/5/130541677/4bee4ac45fdfb8.pdf
    • http://elaurayoga.net/uploads/1/3/0/8/130874108/7851707.pdf
    • http://haugenod.net/uploads/1/3/1/3/131382018/b74598f49ed22.pdf

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