Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82d60d4b2e3db91…

MALICIOUS

PDF

16.7 KB Created: 2020-03-25 12:33:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cd5f32a60a47641d7951d125b1f995ca SHA-1: 0d173fb1b3cf5845176a7e070dca6a306e8dfbe2 SHA-256: b82d60d4b2e3db9123c7e0e218ee51f9475d18501ac932a74047676876218323
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 of phishing campaigns. It contains numerous external links, with a primary link to http://sweetescape.online/uploads/1/3/0/6/130621161/130621161.html#vicks+warm+steam+vaporizer. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, suggesting an attempt to manipulate search engine results or distribute malicious content across multiple domains. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://sweetescape.online/uploads/1/3/0/6/130621161/130621161.html#vicks+warm+steam+vaporizer
    • http://traciface.com/uploads/1/3/0/8/130873795/1844142.pdf
    • http://frigginrobots.com/uploads/1/3/0/7/130739732/1775678.pdf
    • http://dghuntingleases.com/uploads/1/3/0/5/130545447/1127662.pdf
    • http://purdywoman.com/uploads/1/3/0/5/130540420/a89a392eae.pdf
    • http://hostmaster.youcantalk.pl/uploads/1/3/0/9/130969532/4179723.pdf
    • http://fpucdn.com/uploads/1/3/0/2/130288926/214502.pdf
    • http://craftystudios.co.uk/uploads/1/3/0/6/130620429/jimizafow_jabosiburiwo.pdf
    • http://www.asimpsonmusic.com/uploads/1/3/0/2/130289668/fapakidegezoxu-losunefot.pdf
    • http://ribabyco.com/uploads/1/3/1/0/131070805/8978768.pdf
    • http://johnhenryfox.com/uploads/1/3/0/2/130272488/fogalisize.pdf
    • http://sharpecleaning.com/uploads/1/3/0/4/130476237/514639.pdf
    • http://breakingpointllc.com/uploads/1/3/0/8/130813855/9357256.pdf

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