Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf69898bb48e64a9…

MALICIOUS

PDF

36.0 KB Created: 2020-04-09 17:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a331490b32b54e209cebbeb5dbc27ecf SHA-1: 850e7c6b1b4730aaa90c73e3f846fcb3ff92536a SHA-256: bf69898bb48e64a93d2f67804bf8018a5f8b889b660de176d566f496a2adcbf1
92 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, many of which point to unrelated domains with numeric or generic filenames, indicating a link farm or SEO poisoning tactic. The document body, though obfuscated, contains references to "Command word pathfinder" and the PDF creation tool, suggesting a lure to a malicious website. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://kreativekidsworld.com/uploads/1/3/0/4/130483649/130483649.html#command+word+pathfinder
    • http://proappliancerepairatlanta.com/uploads/1/3/1/4/131454466/lurotuporonoj.pdf
    • http://french-stoves.com/uploads/1/3/0/2/130271078/3290805.pdf
    • http://akenesdoola.com/uploads/1/3/1/4/131407083/1516407.pdf
    • http://emeryplumbing.com/uploads/1/3/0/2/130272616/siwin_minobijirukem_vuwotuxe_xifarunagomanar.pdf
    • http://purewoodfirebrickoven.com/uploads/1/3/0/6/130640013/6435034.pdf
    • http://lyonandtheladies.com/uploads/1/3/0/7/130776405/5d59a.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_off00006590.bin
9e0f685545522cd60195728bf99164008a366be82abca234b15b48780cdefaea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6590 7704 bytes

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