Malicious PDF — malware analysis report

Static analysis result for SHA-256 afaac5c8087b7fa2…

MALICIOUS

PDF

62.8 KB Created: 2020-06-01 07:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00b354ebee851362f7e534921fab6046 SHA-1: 260999c41ff2ca5b5463ecd30e5463d11bb046e4 SHA-256: afaac5c8087b7fa29f68e0ba4f7c33ba9c3d5005af38460e76b0fba16139f1a4
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains text related to 'Gloomhaven character ability cards' and 'wkhtmltopdf', suggesting a lure to potentially malicious or SEO-manipulated content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://proatan.com/uploads/1/3/0/4/130483638/130483638.html#gloomhaven+character+ability+cards
    • http://educatedway.net/uploads/1/3/1/6/131636761/kilojarak_xonenawab_jodavixutizewu.pdf
    • http://koinoniafirstbaptistchurch.com/uploads/1/3/0/9/130969865/mokakalugovojig.pdf
    • http://paintthetownredkc.com/uploads/1/3/0/6/130620710/1252691.pdf
    • http://singularleatherwallet.com/uploads/1/3/0/5/130550700/c32d1.pdf
    • http://hallesdumujon.com/uploads/1/3/0/2/130270918/39d93c.pdf
    • http://samamakanan.net/uploads/1/3/1/0/131070751/2399194.pdf
    • http://marielchantal.com/uploads/1/3/0/6/130639682/zajefuf_nikujinumuwu.pdf
    • https://robesezidir.files.wordpress.com/2020/05/51867844871.pdf
    • https://sisukone.files.wordpress.com/2020/05/52730954020.pdf
    • https://pobukurimu.files.wordpress.com/2020/05/vijot.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_off0000cd1d.bin
6bc6eb536e28978fc3cc7c31526dba2324fdf3bb73bde682ea3521cd45a3e136		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD1D 10176 bytes

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