Malicious PDF — malware analysis report

Static analysis result for SHA-256 218c4bda77d579ac…

MALICIOUS

PDF

43.7 KB Created: 2020-04-17 00:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a48a731aca2ea5920e2bfaeee0f70046 SHA-1: 977e66f96e1478db923e7b78b87223cf96dec20d SHA-256: 218c4bda77d579acd7b84fcb02d13d02f3558efe7ac7be0e34a25e03b15aa766
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains heuristics indicating it is a link farm designed to host multiple malicious PDFs, with one specific URL pointing to an 'Allianz health insurance claim form'. This suggests a phishing or scam lure. The document body, though heavily obfuscated, contains the same URL, reinforcing the intent to direct the user to a potentially harmful external resource. The presence of numerous external links and the invoice/payment lure heuristic strongly suggest a social engineering attack.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://holanomadas.com/uploads/1/3/1/3/131378991/131378991.html#allianz+health+insurance+claim+form
    • http://iaservicesinc.net/uploads/1/3/0/2/130288483/f20df.pdf
    • http://owensoundlaserclinic.com/uploads/1/3/0/8/130813135/lalakomiximutirimo.pdf
    • http://locototejerky.com/uploads/1/3/0/5/130539225/tetizelelufa.pdf
    • http://theteaatelier.com/uploads/1/3/0/2/130274281/motugusuwaf.pdf
    • http://quickfixecig.net/uploads/1/3/1/4/131454190/4741879.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_off00006d38.bin
8168f23ef692e84349ba5dd203e393650bb7089ab344a8f48eea1f191cda08af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D38 8516 bytes
font_01_sfnt_off00008dcb.bin
c6c28444bcd94379862b6cc7f8cfcdbcdaeb026857ccdb099d87626a561054a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCB 16092 bytes

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