Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff892e7995211f59…

MALICIOUS

PDF

41.0 KB Created: 2020-04-16 08:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bf12a5d46463e82a6a1a792cea8ac581 SHA-1: 41a55e94fc2f1a56d4e91ccabe5e2a850e432eff SHA-256: ff892e7995211f597509cb6f1c41e4f8984f634771a0698e84f7deb703852f0f
92 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are structured as SEO-optimized URLs pointing to other PDF files. The 'PDF_SEO_LINK_FARM' heuristic indicates a mass of external links, suggesting a link farm or SEO manipulation tactic. The document body, though partially corrupted, contains text related to 'Arborist knots' and the authoring application, which likely serves as a lure. The primary intent appears to be directing users to a network of potentially malicious or SEO-abusing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://morningpeople.club/uploads/1/3/0/7/130775722/130775722.html#arborist+knots+pdf
    • http://amagier.com/uploads/1/3/0/4/130489933/zivilabezapow.pdf
    • http://ozunamarketingagency.com/uploads/1/3/1/4/131408788/retonovesonol.pdf
    • http://hopewellstrategies.com/uploads/1/3/1/3/131384470/sajiluweji-wadusar.pdf
    • http://peacefullivingsolutions.com/uploads/1/3/0/5/130539494/nadiwixisalubuj.pdf
    • http://greenefoxroofing.com/uploads/1/3/1/4/131437252/9372515.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_off00007b9c.bin
49114139b150c9fc7c9ce3b3c5e9d9cb4f48e8aa1218ec3027119e181428a422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9C 7408 bytes

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