Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9b85d8cfd6931cc…

MALICIOUS

PDF

45.8 KB Created: 2020-04-12 23:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4a742996691d26b4e2548b569977be34 SHA-1: 251e15ab4e381a8af4a8a0f498a118a9d71779ef SHA-256: d9b85d8cfd6931ccd10b73150bcff350404a04e844f6d1aca2decf0e57bd572f
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1598 TTPs: Gather Victim Identity Information T1204.001 User Execution: Malicious Link

The PDF file contains a large number of external links, many of which point to uniquely generated PDF files on various domains. This behavior is indicative of a link farm or SEO spam tactic, designed to drive traffic to potentially malicious or low-quality content. The document body, though partially obfuscated, mentions 'Concepto de contabilidad financiera segun autores', suggesting a lure to attract users interested in financial topics. No scripts were extracted, limiting the analysis of direct malicious 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://roadshowarchitects.com/uploads/1/3/0/7/130775752/130775752.html#concepto+de+contabilidad+financiera+segun+autores
    • http://mattmarthawedding.com/uploads/1/3/0/3/130323959/vawoposizoveno_jolapisasin_guwomovafar_tilukafowesu.pdf
    • http://rossschwaber.com/uploads/1/3/0/2/130272945/jopune_memodafevezezew.pdf
    • http://672woodworks.com/uploads/1/3/1/3/131398109/geguxifomigapopobox.pdf
    • http://elchristian.com/uploads/1/3/0/7/130776312/fararavubipote.pdf
    • http://icecasting.net/uploads/1/3/0/7/130739625/fawoginovusowa-putodowije-wupiduz.pdf
    • http://jimigoisland.com/uploads/1/3/0/6/130604192/1127871.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_off00008623.bin
b3a9b016b0a89d1ebce8bc74a8ca3e38d7ec9584d08352ed2207293cbc999228		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8623 10076 bytes

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