Malicious PDF — malware analysis report

Static analysis result for SHA-256 760d219bc2d82885…

MALICIOUS

PDF

39.7 KB Created: 2020-05-14 15:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c57869b9ca3e54f40d679417197649fe SHA-1: b8129ea504d42fc0ff0de2a32a1ddd3ffde7569d SHA-256: 760d219bc2d8288566c32abd299fbc411545af70f9f60c60362f0b1b0056341d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are structured as PDF files with numeric slugs, indicating a link farm for SEO manipulation. One URL, http://kyahfuel.com/uploads/1/3/0/9/130969375/130969375.html#barfi+hd+movie++filmywap, suggests a lure for pirated content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://kyahfuel.com/uploads/1/3/0/9/130969375/130969375.html#barfi+hd+movie++filmywap
    • http://coachjfalcon.com/uploads/1/3/1/8/131871856/2260124.pdf
    • http://shugabugkidsspa.com/uploads/1/3/0/8/130874122/284d33a7a91f440.pdf
    • http://oreillyfinearts.com/uploads/1/3/0/7/130740025/4916621.pdf
    • http://osha10hr.net/uploads/1/3/1/4/131438086/telad-mujofazuxoko-fabegowufo-guxijazut.pdf
    • http://english4apachs.com/uploads/1/3/0/6/130621805/1196558.pdf
    • http://gastoncp.com/uploads/1/3/0/5/130588168/mokov.pdf
    • http://bydanay.com/uploads/1/3/1/4/131454754/tidaziganebefi.pdf
    • http://westernenergy-rd.com/uploads/1/3/0/5/130551004/6087523.pdf
    • http://ips3-bdpresentation.com/uploads/1/3/0/7/130776687/8398316.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006db4.bin
ad065af73ef022c7e426c18e5906a4b8b46ab9ea4f7785ea00faf3e1e23fdd31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB4 11312 bytes

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