Malicious PDF — malware analysis report

Static analysis result for SHA-256 e687b5cb091928ed…

MALICIOUS

PDF

44.1 KB Created: 2020-06-17 06:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aef8a01165331604ebf40321de54575f SHA-1: 25fda59c2b7e860ce1b17f3270531b9141c0f7f2 SHA-256: e687b5cb091928ed2e560b06e7ec6d4f4477118528284b44fb617fa69e4274a0
92 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, a common technique for SEO poisoning or distributing malicious content. The document body, though partially corrupted, suggests a lure related to 'Eating out in london guide'. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates a malicious intent to redirect users to potentially harmful websites. The ML classifier also flagged this PDF with high confidence.

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://431.undesirable.us/uploads/1/3/0/7/130739144/130739144.html#eating+out+in+london+guide
    • http://myersac.com/uploads/1/3/1/1/131164081/xikejatafijix-vasuvisewugufid.pdf
    • http://phalanx-performance.com/uploads/1/3/0/2/130289776/1c497832.pdf
    • http://admin.jakdempseydesign.co.uk/uploads/1/3/0/5/130540540/f598be30.pdf
    • http://lopezhomeimprovements.net/uploads/1/3/0/6/130605111/wuroxemereloda.pdf
    • http://westcliff-realty.com/uploads/1/3/0/8/130814001/2329855.pdf
    • http://sunodessertemory.com/uploads/1/3/0/6/130605521/kogidobo-wuvijijevele-gopok-sepikopolemijeb.pdf
    • http://tastetheroots.com/uploads/1/3/1/4/131437194/8352036.pdf
    • http://safeplacebedding.es/uploads/1/3/0/4/130488332/bifula.pdf
    • http://1stopgen.com/uploads/1/3/1/3/131384335/e24f22bc1233.pdf
    • http://barryplatt.net/uploads/1/3/0/4/130488704/8369568.pdf
    • http://berrynicejams.com/uploads/1/3/0/3/130313286/5987631.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000708e.bin
c3b922ff3dfb18963438b748573cd76452c93eadd6c9a71ff6adfcf1bbfbb504		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708E 4556 bytes
font_01_sfnt_off00008017.bin
afd62c0550be03e8f4f00d30ed96f087e8e1fad00c6bd55575fe7cb5c22ef144		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8017 10584 bytes

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