Malicious PDF — malware analysis report

Static analysis result for SHA-256 f50ec599f06c2ca1…

MALICIOUS

PDF

40.3 KB Created: 2020-04-14 04:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5ed74e7b47f0cb7495072f2042a5c840 SHA-1: b34ddd75b556bd6567697b8ef9d3c3be0d54e895 SHA-256: f50ec599f06c2ca1fa7e66d292f1e970d6a4c349c63eb0cbf788bf5c44397f7a
62 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 User Execution

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or a distribution mechanism for further malicious content. The document body itself is heavily obfuscated and contains embedded URLs, but the primary malicious activity appears to be the mass linking to external resources.

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://homeboxzero.com/uploads/1/3/0/6/130639162/130639162.html#atex+zone+classification.+pdf
    • http://acasadaserra.com/uploads/1/3/0/4/130483393/ripija-vegidanodi.pdf
    • http://christmastreesfortcollins.com/uploads/1/3/1/6/131606955/9172304.pdf
    • http://crownitnow.com/uploads/1/3/1/3/131380626/bejidatoxaxibanukob.pdf
    • http://liuxueshengdaigou.com/uploads/1/3/1/4/131437776/zapamemibosuluv.pdf
    • http://daintel.net/uploads/1/3/0/5/130551505/kejopididur-nutiluvufizu-romukubekepi-zorojemobizosu.pdf
    • http://transmountainfinancialgroup.com/uploads/1/3/0/4/130489536/sumefosati.pdf
    • http://mikebarnescoach.com/uploads/1/3/0/8/130874240/76beb3c7ec590c5.pdf
    • http://redoubt10.com/uploads/1/3/1/4/131454586/bevano.pdf
    • http://redoubt10.com/uploads
    • 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_off00007480.bin
b7904a134e956f6fe7f692bf203d4099b0d89ac29daf3a05856d4a92ec17cb97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7480 9160 bytes

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