Malicious PDF — malware analysis report

Static analysis result for SHA-256 8464e13f94eddf9c…

MALICIOUS

PDF

31.6 KB Created: 2020-05-17 08:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d8abb6b62f29fb1cebbcb9333feb96f SHA-1: 7a8bde5c838905c0e4f5cf22bf29a7c97d9848da SHA-256: 8464e13f94eddf9cc4ee76f838bc3cba2b1f550cbfa239428b9be75047693687
62 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 to other PDF files hosted on various domains. This pattern is indicative of SEO poisoning or a link farm designed to distribute malicious content or redirect users to phishing sites. No scripts were extracted from this sample, and the document body is largely unreadable binary data. The primary attack vector appears to be the embedded URLs.

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://picaresquepress.com/uploads/1/3/1/1/131164558/131164558.html#barium+enema+indication+pdf
    • http://attiliosfarms.com/uploads/1/3/1/4/131438260/1098872.pdf
    • http://plumbingsystems.org/uploads/1/3/0/4/130476204/bekufi.pdf
    • http://arttherapytraining.org/uploads/1/3/0/2/130289686/079ba49.pdf
    • http://citytourdeals.com/uploads/1/3/1/4/131438456/bexipavulabaw-velunegekezek-vibef-xepofaxo.pdf
    • http://zoe4kids.com/uploads/1/3/0/3/130379423/xugele.pdf
    • http://sandyguillot.com/uploads/1/3/0/9/130969200/7a845da46933a.pdf
    • http://salesleadershipseries.com/uploads/1/3/1/8/131856146/974927.pdf
    • http://heavensententerprises.com/uploads/1/3/0/6/130621490/dojidejilegaza.pdf
    • http://balance360.net/uploads/1/3/0/8/130814009/pelimok.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_off00005357.bin
28e76dd9719648b94bc99e2b25e693ac3cc6e5bb13ddf3a27b3223c69ee754bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5357 9420 bytes

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