Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7fea9daf2f60b7…

MALICIOUS

PDF

32.3 KB Created: 2020-04-06 09:44:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 847f67a7289abb9d682f14b18fc71312 SHA-1: ef600ce981464b8b837cb8ffcf28feaad861da7c SHA-256: 1b7fea9daf2f60b7e62b7e7bf774e793e1f3705be14ccc76d5fd0365e4b6c92b
62 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links to various domains, identified by the PDF_SEO_LINK_FARM heuristic. These links point to other PDF files, suggesting a link farm or a distribution network. The document body, though partially corrupted, contains text related to a dictionary and the wkhtmltopdf application, which is unusual for a legitimate document. The primary attack pattern involves luring users to these external resources, which could host further malicious content or be part of an SEO poisoning scheme.

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://sempertigris.com/uploads/1/3/0/2/130289493/130289493.html#diccionario+espa%C3%B1ol+griego+antiguo
    • http://alalson.info/uploads/1/3/0/5/130540134/beb6e057b01c.pdf
    • http://dandelionsofhope.com/uploads/1/3/0/8/130813511/pokologof_gajemowokag.pdf
    • http://rappel-tireuseabiere.fr/uploads/1/3/0/9/130969226/4762291.pdf
    • http://iainalexander.pl/uploads/1/3/0/5/130590564/3506292.pdf
    • http://itcouldbu.com/uploads/1/3/0/2/130270996/pebigududup.pdf
    • http://journeykck.com/uploads/1/3/1/4/131453143/9496837.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_off0000554e.bin
9196073f30ed18a0baacb8ef9068137c2645e8a7074e550fbef7d6f2b547cc41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x554E 7936 bytes

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