Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c76d73105777eeb…

MALICIOUS

PDF

32.0 KB Created: 2020-05-31 18:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f7e7a116cefa4306b48725389cd2146 SHA-1: e885537400d59278065ad3a02d971ae4b85843d8 SHA-256: 3c76d73105777eebaf2a2ecb05662fe09cfd77520ce871055788936a385f327b
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body mentions 'Wacker bs60 2i parts manual', suggesting a lure to disguise the malicious intent. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this behavior, pointing to multiple suspicious URLs.

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://chinahornensemble.com/uploads/1/3/0/7/130740129/130740129.html#wacker+bs60+2i+parts+manual
    • http://cucinadisole.fr/uploads/1/3/1/4/131407469/9320111.pdf
    • http://cpanel.alphaetarho.org/uploads/1/3/1/3/131380265/dejotimumum.pdf
    • http://taylormadecraft.com/uploads/1/3/0/7/130739614/tanodoramo.pdf
    • https://detixuge.files.wordpress.com/2020/05/masamofejuruxabekepepovam.pdf
    • https://dopuzifiza.files.wordpress.com/2020/05/99179566942.pdf
    • https://nubudin.files.wordpress.com/2020/05/detopisalixu.pdf
    • https://vurizuzuni.files.wordpress.com/2020/05/rolek.pdf
    • https://razekusokil.files.wordpress.com/2020/05/78151146782.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_off000051e6.bin
3f1493734c637d5483444c8cae6c6502ea4449f42d5ae2364453781d644f6a29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51E6 10340 bytes

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