Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd34c883ca12f641…

MALICIOUS

PDF

40.8 KB Created: 2020-04-05 08:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 43a567afe0681b55ba1f0ee1bd57e5a1 SHA-1: 1087881e7c0192cfab331ca0cd92d15649f9ed5e SHA-256: bd34c883ca12f641b4b7857f0fdb94e54558496442c015fd8c76998d9c50ecfd
62 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF file contains a significant number of external links to various domains, a pattern indicative of a link farm or SEO manipulation. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior. While no scripts were extracted, the sheer volume of external URLs suggests an attempt to direct users to potentially malicious or deceptive content hosted elsewhere. The document body itself is heavily obfuscated and contains metadata from wkhtmltopdf, suggesting it was programmatically generated.

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://nmawhc.org/uploads/1/3/0/4/130488829/130488829.html#plan+de+estudios+prepa+7+unam
    • http://enlightenmentsangha.org/uploads/1/3/0/4/130488199/b974404e251.pdf
    • http://edaumarchitect.com/uploads/1/3/1/4/131453170/redamijumotafo_rojikoganev.pdf
    • http://sonleducate.com/uploads/1/3/0/6/130604516/jisazutejolumurodiw.pdf
    • http://tappifi.com/uploads/1/3/0/8/130874674/a25ec63.pdf
    • http://lift4life.com/uploads/1/3/0/5/130588405/fovigosa.pdf
    • http://everetttreeservicepros.com/uploads/1/3/0/7/130775786/2281371.pdf
    • http://officialericcrooks.com/uploads/1/3/0/8/130874667/loxisidozopakegux.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_off00007159.bin
899c351fd73e220937848d8b2bb11c2d322a789ea4c15c527196121cca5bcd80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7159 10188 bytes

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