Malicious PDF — malware analysis report

Static analysis result for SHA-256 90605881c84f91e0…

MALICIOUS

PDF

43.5 KB Created: 2020-05-27 07:17:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae693b264fa356f9fabbee49a626665e SHA-1: a67975c45923927ea39b4103cb92c1139aad2005 SHA-256: 90605881c84f91e01e37009b3e10139032011eae0e464e67f0416887e3868be2
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, many of which appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a redirection or content delivery scheme. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the structure and linked URLs point to a malicious redirection or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://bluemtcap.com/uploads/1/3/1/4/131407369/131407369.html#molecular+biology+of+the+gene
    • http://terindevoto.com/uploads/1/3/0/2/130274282/pukige-kononadu-ramopawo.pdf
    • http://raisingkanephotoco.com/uploads/1/3/1/3/131383330/6440967.pdf
    • http://mrsshamrock.com/uploads/1/3/0/5/130590219/derafes.pdf
    • http://prosperpresents.com/uploads/1/3/1/8/131871991/newakafobutupijavif.pdf
    • http://powerbeadbracelets.com/uploads/1/3/0/4/130483937/40f815.pdf
    • http://masteringjack.com/uploads/1/3/0/9/130969982/tenazegevasiles.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_off00007e6c.bin
385529eb7c3733959db4c4991a6bdd31bb7eca174de58e1f57de238c6297ea69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6C 10780 bytes

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