Malicious PDF — malware analysis report

Static analysis result for SHA-256 306c6bf14d8468c1…

MALICIOUS

PDF

52.7 KB Created: 2020-04-18 04:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 8ca660ebe2ae41789d7c4fc7d872429f SHA-1: b4ffffd46e695acdbe2be13c33431fb9f56b56b2 SHA-256: 306c6bf14d8468c1fe2930225fa95e99a54829d8f76cc75f5a81ee995881d57e
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior. While no scripts were extracted, the sheer volume of external links suggests a malicious intent to redirect users to potentially harmful websites.

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://siroculusdesigns.com/uploads/1/3/1/4/131437319/131437319.html#differentiation+chain+rule+problems+pdf
    • http://spaziozero.org/uploads/1/3/0/5/130588678/9049047.pdf
    • http://150daily.com/uploads/1/3/0/6/130621105/2375480.pdf
    • http://colibriazul.com/uploads/1/3/1/3/131379296/1d7c1b1042dc.pdf
    • http://fotowerk.net/uploads/1/3/1/3/131383998/795a2162.pdf
    • http://jardindeville.net/uploads/1/3/0/6/130604874/7174838.pdf
    • http://allwasheduppressurewashingservices.com/uploads/1/3/0/6/130620882/vidubopapoje.pdf
    • http://it-computing.net/uploads/1/3/0/4/130435945/vejeju_tizax.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_off0000a2bd.bin
9250cf5ba2532b4c42bfd93c0cf7860c8a3dc2bce87725b92ebc2eff37c6470d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BD 9016 bytes

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