Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c158390fb9c8894…

MALICIOUS

PDF

16.9 KB Created: 2020-04-03 15:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 17168923811370ab3f9bdcd4a610fe65 SHA-1: f9b889d1f66eada0d247f04f2f104ededc9e7d6d SHA-256: 4c158390fb9c88944a92e0726ee2447771ba25759613eef86eb4b508a909b2e8
112 Risk Score

Malware Insights

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

The PDF is identified as an image-only lure, typical of phishing campaigns. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The primary URL, http://mujerplena.org/uploads/1/3/0/2/130288523/130288523.html#australian+forklift+training+manual, is presented as a training manual, likely a pretext to entice clicks. No scripts were extracted, but the extensive link farm and image lure strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://mujerplena.org/uploads/1/3/0/2/130288523/130288523.html#australian+forklift+training+manual
    • http://doileybirds.com/uploads/1/3/0/6/130620581/vevon.pdf
    • http://zaky.org/uploads/1/3/0/4/130488243/2863632.pdf
    • http://sunrayservices.net/uploads/1/3/0/6/130621909/tesajipiwe.pdf
    • http://sweatdujour.com/uploads/1/3/0/5/130590314/dajosapopuxeba_podijo_xedeji.pdf
    • http://jdwright.ca/uploads/1/3/0/8/130874053/vubilutaretilejugem.pdf
    • http://psicologiapublica.org/uploads/1/3/0/5/130551641/ae9a35db0aa2.pdf
    • http://rouviere.xyz/uploads/1/3/1/4/131406270/5bc9e7.pdf
    • http://tiletowel.com/uploads/1/3/1/4/131438110/dakavazitawapep_deluge.pdf
    • http://gottusshired.com/uploads/1/3/0/8/130814132/3354237.pdf
    • http://azfairhousing.org/uploads/1/3/1/1/131164009/caf9b8e10ad.pdf
    • http://luxlivemykonos.com/uploads/1/3/0/5/130589180/4770167.pdf
    • http://blacklabeljerkyvt.com/uploads/1/3/0/4/130435972/dixifera.pdf

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