Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc7534165a8d8a6…

MALICIOUS

PDF

35.3 KB Created: 2020-06-15 07:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f7b5bba35ee432b053e540a1ebdfe8e SHA-1: f1a2805bf3ba7189b4df76b258a8025f8e3302cf SHA-256: cfc7534165a8d8a663841bae377a06d04572ddf30f90fe7c5e146fce53693823
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body text is heavily obfuscated but appears to contain references to a Yamaha MT120 manual and wkhtmltopdf, suggesting a lure. The primary attack pattern involves directing users to a vast collection of other PDF files hosted across numerous domains, likely for SEO manipulation or to host malicious content. No scripts were extracted, and the document body was not fully readable, limiting the ability to determine the exact payload or intent beyond link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://frenchhomesolutions.com/uploads/1/3/0/3/130313115/130313115.html#yamaha+mt120+manual
    • http://tag-walk-creative.com/uploads/1/3/0/5/130588261/796946.pdf
    • http://dirapublishing.com/uploads/1/3/0/5/130540304/gurewugupume.pdf
    • http://ns1.lebreadshop.com/uploads/1/3/0/8/130813448/lijuwemosusefejanop.pdf
    • http://apply.centralhauling.com/uploads/1/3/0/6/130621757/purar.pdf
    • http://meinpuls.de/uploads/1/3/0/7/130739780/0080bcfba2e602.pdf
    • http://fdam.org/uploads/1/3/0/7/130740164/tibowopafi-xalikim-zojiraforalul-mamaroniduze.pdf
    • http://toa.travelofamerica.com/uploads/1/3/0/7/130775145/derolusi.pdf
    • http://kathleenmaree.com/uploads/1/3/1/3/131380754/ripexasuze-tadilege.pdf
    • http://mta-sts.mail.practicalcoldcase.com/uploads/1/3/1/4/131437844/fabodelurola_vawoduleb.pdf
    • http://oldaleandsons.org/uploads/1/3/1/3/131384113/4011499.pdf
    • http://apalabarclay.com/uploads/1/3/0/2/130291646/878f3b0705fc84.pdf
    • http://appllancepro.com/uploads/1/3/0/7/130738662/mabefaruxagigasakaso.pdf
    • http://rustycricket.com/uploads/1/3/0/6/130604112/7b882ce57271.pdf
    • https://panuvezipib.files.wordpress.com/2020/06/wadiwik.pdf
    • https://dunemekuw.files.wordpress.com/2020/06/ziseregevaro.pdf
    • https://warezofokel.files.wordpress.com/2020/06/23530900255.pdf
    • https://vukomalej.files.wordpress.com/2020/06/rakaledatowowexipasux.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_off00005c2a.bin
2d6fba55aab4002e98a50111909510a255e4832b1565664747f4e9c98971209d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2A 10636 bytes

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