Malicious PDF — malware analysis report

Static analysis result for SHA-256 51f20da5c359906f…

MALICIOUS

PDF

38.9 KB Created: 2020-05-08 03:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a707c9872dd3738e47ed991857e20598 SHA-1: 4ed19732103c47e65b9a0847872f6c79735d53a4 SHA-256: 51f20da5c359906fa95def085d7323689dfc16e6b4b99fef5a51f6af27e54d98
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains that appear to be part of a link farm. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a lure to potentially malicious content, possibly for SEO spam or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 3

  • 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.
  • 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://jenntreado.com/uploads/1/3/1/0/131071289/131071289.html#calibre+bossnut+user+manual
    • http://wammofficial.com/uploads/1/3/0/5/130550682/raxapaxufudo_vokixaxe_darobivaz_bikowevujadugo.pdf
    • http://camassiss.com/uploads/1/3/0/6/130604311/5596278.pdf
    • http://tinamariemateja.com/uploads/1/3/1/3/131379225/gowawovov.pdf
    • http://24h-story.de/uploads/1/3/0/6/130620955/gebatuw.pdf
    • http://criticalmoments.net/uploads/1/3/0/8/130813079/6137614.pdf
    • http://mikecontente.com/uploads/1/3/0/6/130604114/tetizuwupiwunelixeji.pdf
    • http://rocknpaws.net/uploads/1/3/0/7/130739437/5559555.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b5b.bin
07c0d99cab985ffa1d0ee64c9c079c2ea449c14d955037752595eb751d940a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5B 11368 bytes

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