Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39831601128d496…

MALICIOUS

PDF

35.0 KB Created: 2020-05-30 08:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 664adc12be4e68c049668930e6b9f8ee SHA-1: 0ae8652b5d0536ff455da62618dd3f8c161df00b SHA-256: c39831601128d496a296c8e9f01b9c4599696308c11bd379bb35a9b1e4537036
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF document contains multiple embedded URLs pointing to external websites, identified as a link farm. The document body, though partially corrupted, contains text related to 'Avances cientificos y tecnologicos' (Scientific and Technological Advances), suggesting a lure to entice users to click on the malicious links. The heuristic 'PDF_SEO_LINK_FARM' indicates a pattern of generating numerous links, likely to improve search engine ranking for malicious content or to distribute malware. No scripts were extracted from this sample.

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://ringsbyvia.com/uploads/1/3/0/5/130551256/130551256.html#avances+cientificos+y+tecnologicos+d
    • http://barrehop.com/uploads/1/3/0/9/130969355/8d017.pdf
    • http://codilis.net/uploads/1/3/0/7/130740344/60265.pdf
    • http://migratingnorth.com/uploads/1/3/0/5/130545475/xijolegaka.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_off00005c50.bin
5dd14d36afccfbd8aebe63fd98665ce5dc1a447e7a51ae29fe4759dba43c5a6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C50 10976 bytes

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