Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73d0a8bed73c81e…

MALICIOUS

PDF

37.3 KB Created: 2020-06-01 05:21:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c34ed742e017a47825ed789048797ec9 SHA-1: 077a59552b7196d9463ab856fdd23f72333f6b91 SHA-256: f73d0a8bed73c81e7dfda0218a94fee4a66cb5565409c9af3427df1c217dbba9
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body text, though partially corrupted, suggests a 'certificate of completion' lure. The primary attack pattern involves directing users to a vast farm of external URLs, likely for SEO poisoning or to host further malicious content. No scripts were extracted from this sample.

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://x0875011xstreamtravel.xsideas.com/uploads/1/3/1/4/131483218/131483218.html#certificate+of+completion+pdf
    • http://maxbrandenburg.com/uploads/1/3/0/7/130739782/80728.pdf
    • http://deamermotorcarcompany.com/uploads/1/3/0/7/130739153/kinodadefig_fijimurasurugik_masesuxise_zomidibawiw.pdf
    • http://jkexteriorsllc.com/uploads/1/3/0/9/130969082/werinul_timokiginul_kejugigaxowuwux_toxixajelipoj.pdf
    • http://johnstonespiritualistchurch.com/uploads/1/3/0/3/130313063/9191048.pdf
    • http://hostmaster.gailswoope.com/uploads/1/3/0/4/130489434/nowevebub-dosavinafosipi-naxukelisedofar-malez.pdf
    • http://metheringhamairfield.org/uploads/1/3/1/4/131438036/naxiluvegomasux-leratiwepu-zipifina-baxot.pdf
    • http://nickiyoungconsulting.com/uploads/1/3/1/6/131636774/zetixofum.pdf
    • http://renovliesbehangers.com/uploads/1/3/0/2/130289632/wotivevabozag.pdf
    • http://smileytolson.net/uploads/1/3/0/3/130379317/9248390.pdf
    • https://boxununuxin.files.wordpress.com/2020/05/zaviguronojewowutejawowef.pdf
    • https://mazagutote.files.wordpress.com/2020/05/21183461431.pdf
    • https://tavijoga.files.wordpress.com/2020/05/55425652876.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_off000066af.bin
1f53305faf9963bc25222a4e6e0a59a94b3150b21bd844fd4e21db67a9bc2f7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66AF 10292 bytes

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