Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e194d547614cff3…

MALICIOUS

PDF

39.5 KB Created: 2020-03-19 07:26:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a554730d02833edca4e3700ac7071528 SHA-1: 1013da20c0d248fdf24947f350f76842f13dfb30 SHA-256: 9e194d547614cff3912260b0c99cfb45626d8156a00a495d58d20f32b611243c
92 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which follow a similar numeric-slug pattern, indicating a link farm or SEO abuse tactic. The ML classifier strongly flagged this PDF as malicious. The document body text, though partially garbled, includes the title 'Propiedades de las matrices simétricas' and references to wkhtmltopdf, suggesting a lure to potentially malicious external 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://machoco.com/uploads/1/3/1/0/131070459/131070459.html#propiedades+de+las+matrices+sim%C3%A9tricas
    • http://www.youniquedancewear.com/uploads/1/3/1/0/131071209/6771005.pdf
    • http://strada-anglija.elikaro.eu/uploads/1/3/0/5/130551708/7634827.pdf
    • http://eveninghaha.com/uploads/1/3/0/7/130775025/pubanobunalediko.pdf
    • http://cmifamily.com/uploads/1/3/0/3/130313786/kurovewimugotu.pdf
    • http://wagnercottonwedding.com/uploads/1/3/0/3/130379611/kuwofixipobeveviveme.pdf
    • http://babagoosh.com/uploads/1/3/0/8/130873877/839f2632bfd2ee.pdf
    • http://ftp.siliconvalleyrugby.org/uploads/1/3/0/3/130323186/paxapazofazulenapota.pdf
    • http://www.southshorescoop.com/uploads/1/3/0/5/130551338/werako.pdf
    • http://wikiscifi.com/uploads/1/3/0/2/130287883/kujumone.pdf
    • http://marco.assetmedia.nl/uploads/1/3/0/5/130588475/4153767.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_off00006c2e.bin
c38456723d5109528168cfc013bacca3e3262e2436c8be5ce68bf6c89ae484be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2E 9584 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.