Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b2dfc3879fa918…

MALICIOUS

PDF

53.7 KB Created: 2020-04-10 07:43:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f73c982810604d3696f3eae71c42e5ec SHA-1: eb4718c45c416181f4cd7053944ce02766c97d5c SHA-256: 20b2dfc3879fa9180233ababa593e10e093e46a44f35840537f471ff0cc1e8c3
82 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which point to seemingly unrelated PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The document body and heuristic firings indicate a callback phishing lure, where the user is prompted to call a phone number related to billing or refunds. This is a common social engineering tactic used to extract sensitive information or money from victims.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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://benbulkeley.com/uploads/1/3/0/6/130604255/130604255.html#missouri+tax+form+mo-1040
    • http://iriszphotography.com/uploads/1/3/0/7/130776230/374669.pdf
    • http://sundownmusical.com/uploads/1/3/1/0/131070450/561f1f7c.pdf
    • http://palladianpartner.com/uploads/1/3/0/6/130620412/gifafavig_tazilamadatonib_xonojat_sepotev.pdf
    • http://ichoosefoundationinc.org/uploads/1/3/1/4/131407812/kisome_jimore_jewobatazareri_popivuvizuxog.pdf
    • http://liv-your-best-life.com/uploads/1/3/0/3/130313784/fexinimomu-nejixuremewasi.pdf
    • http://whvusa.org/uploads/1/3/1/0/131070774/vopabanegol.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_off0000945d.bin
008809ac983cfaf422a1cf6895d5469718dbb66579f179905268dd1260d1531b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x945D 8608 bytes
font_01_sfnt_off0000b55c.bin
85a8e5e8c4785736b18b61d32d89772a82cf17d54ce5b009d04fdb45518dc61e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB55C 16048 bytes

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