Malicious PDF — malware analysis report

Static analysis result for SHA-256 4386fd5dd462228f…

MALICIOUS

PDF

35.7 KB Created: 2020-04-03 12:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 620f460c168c045877b2f98313e1870f SHA-1: 0527a1b81f3eb44c629d8d2ac04d4753bfed1cf1 SHA-256: 4386fd5dd462228f5923d2e13bfef6d1f483a0d453ff3db8375b9ac8facf2721
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This indicates a link farm or SEO manipulation tactic. The document body, though partially corrupted, contains text related to 'Definicion de expresion corporal en educacion fisica' and references the wkhtmltopdf tool, suggesting it was generated programmatically. The primary intent appears to be directing users to a network of websites, likely for malicious purposes such as phishing or malware distribution.

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://termitespestcontrol.net/uploads/1/3/0/6/130605312/130605312.html#definicion+de+expresion+corporal+en+educacion+fisica
    • http://yksconsultancy.com/uploads/1/3/0/4/130483265/f9f4582e83bf19d.pdf
    • http://politicalethnographyproject.org/uploads/1/3/0/5/130540085/9a66699.pdf
    • http://74-123-77-126.mgwnet.com/uploads/1/3/0/7/130739333/5b021d5f4982.pdf
    • http://whm.pflaghouston.org/uploads/1/3/0/7/130774964/225761.pdf
    • http://661junkhauling.com/uploads/1/3/0/6/130620402/3858843.pdf
    • http://darlingdiscounts.com/uploads/1/3/0/6/130621124/51808.pdf
    • http://buth-man.com/uploads/1/3/0/7/130776821/furenasu.pdf
    • http://hopeeaglepreschool.org/uploads/1/3/0/5/130589384/3469866.pdf
    • http://wildthingsbrooklyn.com/uploads/1/3/1/0/131070733/7011310.pdf
    • http://privettart.net/uploads/1/3/1/0/131069860/1766158.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_off00006336.bin
2c31c5f83655d4d2b94c8e53388834553b2c468c579270e2991635490cbb09ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6336 7736 bytes

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