Malicious PDF — malware analysis report

Static analysis result for SHA-256 389bdb5405331739…

MALICIOUS

PDF

16.3 KB Created: 2020-04-02 08:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 628ad99ae8024bc423305d3ff72cfc64 SHA-1: 69bc3f99adfd4a93c76167875c0d66b4a17ff10c SHA-256: 389bdb54053317393c74fd9e80b66c9620f7e642c4a6a065dc98cfa8648fb7ad
82 Risk Score

Malware Insights

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

The PDF file is identified as malicious due to its structure, which resembles a screenshot lure designed to trick users into clicking embedded links. The document body contains numerous external URLs, suggesting a link farm or redirection mechanism. The primary attack pattern involves a user being presented with what appears to be a benign image or document, but which actually contains a clickable element leading to malicious content hosted on external domains.

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 16 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://pipelinecourses.org/uploads/1/3/1/1/131163969/131163969.html#funciones+trascendentes+problemas+resueltos
    • http://mrterrier.com/uploads/1/3/0/6/130621303/zijufaravikanadigi.pdf
    • http://jump-services.com/uploads/1/3/0/3/130379479/notabok.pdf
    • http://livincorp.com/uploads/1/3/0/4/130435561/853436.pdf
    • http://ltcsoftball.org/uploads/1/3/0/7/130776263/vupajik.pdf
    • http://kisaanrecords.com/uploads/1/3/0/6/130604984/3f49919015.pdf
    • http://atallconstruction.com/uploads/1/3/0/4/130489650/vipilukevarola_lokaj.pdf
    • http://spectrumsignscalifornia.com/uploads/1/3/0/2/130271094/zunuresazafoj.pdf
    • http://itahani.com/uploads/1/3/0/5/130590353/kixujukawupo.pdf
    • http://daveelboymarco.com/uploads/1/3/0/6/130639510/xesawo-xinivekeludol.pdf
    • http://leadworxltd.com/uploads/1/3/0/3/130313339/b9d0126cb.pdf

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