Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c829c539076a56…

MALICIOUS

PDF

38.3 KB Created: 2020-04-05 16:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b686f2913f5077c7394f5e73a5414e76 SHA-1: fbbf297bcc630402dd8c3222432011290d2abd40 SHA-256: 39c829c539076a5687626db5824ed28336e74db716ff0551217d5dc5c78aec67
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains references to these URLs. The primary function appears to be directing users to a network of websites, likely for SEO spam or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://erikaarana.com/uploads/1/3/1/3/131380811/131380811.html#libro+fotografia+digitale
    • http://reneesmall.com/uploads/1/3/0/3/130379098/b8d012a95df.pdf
    • http://topneurosurgery.com/uploads/1/3/0/5/130551369/1b6cc96815b82.pdf
    • http://prrealty.net/uploads/1/3/0/7/130739474/f338df91cc81b00.pdf
    • http://saddleslimecreations.com/uploads/1/3/0/5/130544070/ponimilijo.pdf
    • http://kismetwineinc.com/uploads/1/3/1/0/131070874/1404185.pdf
    • http://mastiffclubofamericanationalspecialty2017.com/uploads/1/3/0/6/130604093/7084928.pdf
    • http://zongatron.com/uploads/1/3/0/8/130873975/5891184.pdf
    • http://tammyflynn.com/uploads/1/3/0/7/130775309/73c04fbf41a4.pdf
    • http://rivitekltd.com/uploads/1/3/1/3/131398449/kejadimo.pdf
    • http://globalvenue.org/uploads/1/3/0/6/130620751/4889755.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_off00006a54.bin
682a83fad56804777302f799a88235ce97d43327bec6b57907badbb48d2d2d80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A54 10172 bytes

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