Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5c104653671e87f…

MALICIOUS

PDF

38.4 KB Created: 2020-04-19 07:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 663e4b13f54b553b38beb0be0104ddc7 SHA-1: 257cb2f790e28ccb866b171040c5fd8a83243b74 SHA-256: d5c104653671e87f0c661057b55d9c65fa92c86c585d2cb7037fd92a0388ef10
62 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO spam operation. The heuristic PDF_SEO_LINK_FARM firing confirms this, indicating the document's primary purpose is to drive traffic to these external sites. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of specific user lures.

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://jackbuchangolf.com/uploads/1/3/0/9/130969488/130969488.html#dividing+negative+numbers+worksheets
    • http://dallinnelsonink.com/uploads/1/3/0/3/130312972/4313548.pdf
    • http://tianaskitchen.com/uploads/1/3/0/9/130969329/zasunevifi.pdf
    • http://squatchlandapparel.com/uploads/1/3/0/6/130621985/lijazisav.pdf
    • http://thebestaddress.org/uploads/1/3/0/8/130813715/f3842.pdf
    • http://gtparts.net/uploads/1/3/1/3/131381111/4865334.pdf
    • http://newholland4wdtractor.com/uploads/1/3/1/4/131483282/valixuju-gaxeniwe-zipodozugefotu-raxan.pdf
    • http://cifra-ie.com/uploads/1/3/0/8/130813577/vamowavivemimedup.pdf
    • http://mail.columbiacomputers.com/uploads/1/3/0/8/130813054/3570997.pdf
    • http://posture4golf.com/uploads/1/3/1/4/131453605/4fbc678d2627bf.pdf
    • http://thecollectionbysafari.com/uploads/1/3/1/3/131381976/4611903.pdf
    • http://iris-mueller-design.de/uploads/1/3/1/0/131070500/wewesod.pdf
    • http://cloud9games.net/uploads/1/3/1/4/131483253/xuxox.pdf
    • http://pokenfil.com/uploads/1/3/1/3/131398015/duzun-pukofekogoza-nufunajodebox-pitirunivefu.pdf
    • http://virginrum.com/uploads/1/3/1/4/131453894/releloxu_gefiwog_wubexosiku_direvasositi.pdf
    • http://cookingwithnoodles.com/uploads/1/3/0/7/130775310/4797531.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_off00006cee.bin
221750c020f71c119ee31ebf996b569dd6e81d33015e5a1659f226f63e3c99f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEE 8388 bytes

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