Malicious PDF — malware analysis report

Static analysis result for SHA-256 41822a0d593f9b86…

MALICIOUS

PDF

43.7 KB Created: 2020-06-22 07:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b34242398c4416dca570f6d26b6a4b5 SHA-1: 3fc0092cd203d6b321295dc9206910f1cdd4d25e SHA-256: 41822a0d593f9b86d666368b1022b823e985481122f112e28df519458a1394fb
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or redirection scheme designed to obscure the ultimate destination or to distribute malicious content across multiple sites. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this malicious intent. No scripts were extracted from this sample, limiting the ability to determine the exact payload or further actions.

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://mail.uicany.org/uploads/1/3/0/5/130590531/130590531.html#community+language+learning+sample+lesson+plan
    • http://meowluxcathotel.com/uploads/1/3/1/3/131383388/rosanuxuwusagole.pdf
    • http://northernpacificbuilder.com/uploads/1/3/1/8/131857421/b4df3536.pdf
    • http://essentialmaskmaker.com/uploads/1/3/0/7/130775334/90ec9888f5803.pdf
    • http://mta-sts.mail.4activelife.com/uploads/1/3/2/6/132683142/1035656.pdf
    • http://hawaiianrustics.com/uploads/1/3/1/3/131398138/1798674.pdf
    • http://cpcontacts.elegantmusic.ca/uploads/1/3/0/4/130475980/sedarameku.pdf
    • http://soltisoft.com/uploads/1/3/1/4/131453034/1eab40d0.pdf
    • http://epicexotic.net/uploads/1/3/1/3/131381946/1d198735.pdf
    • http://callnurture.com/uploads/1/3/0/2/130271017/e839ab3580.pdf
    • http://acclaimcontracting.net/uploads/1/3/0/7/130776358/jawapikikamogupalopi.pdf
    • http://colleenvauxart.co.uk/uploads/1/3/0/5/130551656/6032c4ebea7e7eb.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_off00006d28.bin
9f7760cbcdc1234fdb802f6e2e91fea1766aa12214faa05ff93891a8afa77dc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D28 5144 bytes
font_01_sfnt_off00007e9c.bin
fcad8c33a0d714867689b164bea5509bc3115aa7654711074936a434e9063081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9C 10368 bytes

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