Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe3df8379443bf3…

MALICIOUS

PDF

39.4 KB Created: 2020-03-08 05:39:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 66c389a23539aaa88ccd74e79cadf8d5 SHA-1: 01f8d2c0d791da9425139ef49b3dfd0c46f12106 SHA-256: afe3df8379443bf3b54ace057637db018658b52491a12a5a0fdd581b8287000f
62 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, indicating a link farm or SEO manipulation tactic. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, suggesting it was programmatically generated. No scripts were extracted from this sample. The primary attack pattern involves directing users to a multitude of external 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://abbyssunshinesquad.com/uploads/1/3/0/8/130814675/130814675.html#inductive+and+abductive+logic
    • http://qurantobible.co.uk/uploads/1/3/0/7/130775354/7472878.pdf
    • http://ballroomalliance.com/uploads/1/3/0/7/130739952/bfd38f8422c9.pdf
    • http://laurenwalker.net/uploads/1/3/0/4/130488304/sovaxevinegaxofubom.pdf
    • http://immaginatefotografia.com/uploads/1/3/0/9/130969470/resawewiro.pdf
    • http://allyourteeth.com/uploads/1/3/0/4/130483653/femod_mabepobavej_lelilorojojegel_kimerizopajejul.pdf
    • http://mobitour.net/uploads/1/3/0/6/130604110/8467115.pdf
    • http://franklincountystrong.com/uploads/1/3/0/8/130814308/86719ce362df7.pdf
    • http://refugechurchva.org/uploads/1/3/0/5/130588721/5732928.pdf
    • http://jakebrenneise.net/uploads/1/3/0/6/130620563/nixuvo.pdf
    • http://www.gglandscaping.net/uploads/1/3/0/3/130323928/7683a046bf6.pdf
    • http://webdisk.7devilsbrewery.com/uploads/1/3/0/7/130775261/duziro-ladomaditule-banogobug.pdf
    • http://www.magnoliahillhoa.com/uploads/1/3/0/2/130289266/1275e.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_off00006682.bin
ff1e3f80a09dc0afb9aba7273977c9948a1a5e2684e2ed3bffa97528d5c4e77a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6682 8092 bytes
font_01_sfnt_off0000858c.bin
87fd6b1a35a64f5c2d30902eea89631a9c05d6b36ef70c6d0cee4d2ad867525e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x858C 2596 bytes

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