Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ea4a0e8e2f6205…

MALICIOUS

PDF

34.0 KB Created: 2020-04-19 08:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ac1d0b4bc24824ad8e7566ee415c827c SHA-1: 8df2bd6ed3ce3f0cd14836555e38c9e58a25a726 SHA-256: a9ea4a0e8e2f6205b16caab03a046db6e4731009918730b5ec93d059bbaaebf1
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to similarly structured URLs on different domains, suggesting a link farm or SEO abuse tactic. The document body, though heavily obfuscated, contains references to 'collecting data worksheets ks3' and the wkhtmltopdf application, indicating a potential lure. The primary intent appears to be directing users to external websites, likely for phishing or to serve further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://artofbriannakenney.com/uploads/1/3/0/6/130621772/130621772.html#collecting+data+worksheets+ks3
    • http://lisbonbakery.com/uploads/1/3/1/4/131437742/gakawividazu.pdf
    • http://iraceforbabyangels.com/uploads/1/3/0/6/130621220/4332245.pdf
    • http://aspirationrevolutions.org/uploads/1/3/0/5/130542971/ae0fe89.pdf
    • http://alexpabst.com/uploads/1/3/1/4/131483069/3f4c090a094.pdf
    • http://supersizeled.com/uploads/1/3/1/4/131408838/8163125.pdf
    • http://miracleled.net/uploads/1/3/1/4/131410685/4876945.pdf
    • http://4ufundraising.ca/uploads/1/3/1/6/131636949/fejolopal-solamovuvukuta-nobiwawitoram.pdf
    • http://coloradopallet.com/uploads/1/3/1/4/131438127/teruf_xuxajegob.pdf
    • http://sjperformance.com/uploads/1/3/0/7/130738487/522c869754dbce4.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • 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_off00005e59.bin
6a03a6a8f9b3449670f5f30f064aaa19424b974b640cd00f35f59c537f033824		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E59 7676 bytes

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