Malicious PDF — malware analysis report

Static analysis result for SHA-256 42f9e6e91bec85f7…

MALICIOUS

PDF

40.5 KB Created: 2020-03-14 16:41:00 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: acd502ccbab75a51ff048ed4974d4592 SHA-1: 81f875cc4094550571029a416e81e2f6a7248260 SHA-256: 42f9e6e91bec85f7a344f72dda63989a37098084b23b45f70ff3c08bfb43690f
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, contains French text related to hosting attestation and mentions wkhtmltopdf, suggesting it might be a lure to a malicious website or a collection of malicious PDFs. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://685cm.slpny.com/uploads/1/3/0/7/130776118/130776118.html#attestation+d%27+h%C3%A9bergement+pdf
    • http://eng.golnazbehrouznia.com/uploads/1/3/0/5/130551675/2688154.pdf
    • http://missmenot.online/uploads/1/3/0/6/130620667/texugizeg.pdf
    • http://juliemdoherty.com/uploads/1/3/0/3/130379294/db41fc8d8a1adf.pdf
    • http://www.theph.co.uk/uploads/1/3/0/7/130776222/9262778.pdf
    • http://laurabakerfashion.com/uploads/1/3/0/5/130551518/kupefitaxo.pdf
    • http://applesandbooks.com/uploads/1/3/0/6/130604626/jesoris-neleseve.pdf
    • http://powerstrokeconcepts.com/uploads/1/3/0/4/130436473/vofijenowuwa.pdf
    • http://psychedynamic.com/uploads/1/3/0/7/130739154/418003.pdf
    • http://jwhammond.com/uploads/1/3/0/9/130969198/muzovuvisokaxe.pdf
    • http://www.carney-bombay.com/uploads/1/3/0/4/130436213/bc55783a6b216dd.pdf
    • http://nutritionevangelism.com/uploads/1/3/0/8/130813510/0305bc945c88.pdf
    • http://fikrinisenyonet.com/uploads/1/3/0/4/130435906/kugajofijem.pdf
    • http://alumni-chiropractic.com/uploads/1/3/0/5/130588360/735040.pdf
    • http://stilettosandshotguns.com/uploads/1/3/0/6/130604250/lebugimenokepenuda.pdf
    • http://boogiecamp.com/uploads/1/3/0/9/130969893/1428928.pdf
    • http://nicholasruscettaart.com/uploads/1/3/0/6/130620947/9161002.pdf
    • http://jinbangzaixianyule.f18.ebkf.org/uploads/1/3/0/3/130379479/fejukid.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_off00007389.bin
4fd0ac40caa3f023dc81bfd7cff893d15ad013ffd3072ea70f634e014c15b56f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7389 8684 bytes

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