Malicious PDF — malware analysis report

Static analysis result for SHA-256 28052c3d20eafc3a…

MALICIOUS

PDF

36.9 KB Created: 2020-04-09 21:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: badb72399bf9022911e7e32b38011105 SHA-1: 2025106745433588ed39ac46e8c208073ad6305a SHA-256: 28052c3d20eafc3ae07d9d9dea959977033b78c66c996c6b148bf91323cf9cb8
92 Risk Score

Malware Insights

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

This PDF document was identified as malicious by an ML classifier. It contains a large number of external links, many pointing to other PDF files on different domains, suggesting a link farm or SEO poisoning tactic. The document body contains a mix of seemingly unrelated text and URLs, further supporting the link farm hypothesis. No scripts were extracted, and the primary malicious activity appears to be directing users to external, potentially 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://humannaturefoundation.com/uploads/1/3/0/3/130323705/130323705.html#dil+ka+rishta+songs+free+download+mp4
    • http://assalone.com/uploads/1/3/0/6/130621521/f840bd39667.pdf
    • http://cs25983456.com/uploads/1/3/0/3/130313403/filoxapibavile.pdf
    • http://ponteinc.net/uploads/1/3/0/6/130604666/6f96ed2ef.pdf
    • http://thepoisedpaisleyonline.com/uploads/1/3/0/2/130288383/nojijopela.pdf
    • http://ashgrovecreations.net/uploads/1/3/0/5/130546803/vegowezemutozo_jutef.pdf
    • http://aircraftbrokertraining.com/uploads/1/3/0/8/130814576/3720cd9e76.pdf
    • http://weardoesshe.com/uploads/1/3/0/7/130740547/a03d2789920ba.pdf
    • http://dollrdollr.com/uploads/1/3/0/9/130969592/fatupaderuned.pdf
    • http://audreyscreationsforyou.com/uploads/1/3/0/5/130590158/dc997250f07.pdf
    • http://madisonavenueinvites.com/uploads/1/3/0/5/130541662/409465.pdf
    • http://ranails.net/uploads/1/3/0/7/130740627/183259.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_off0000666d.bin
5ae716d761143b725a3ba73d7fe754a39a909623c4f4fa92588fb0411891cefd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x666D 8352 bytes

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