Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa42681807450af…

MALICIOUS

PDF

38.3 KB Created: 2020-03-14 23:58:32 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 02cf4c4b060660543e09b4430e1a075f SHA-1: ae1a4bbe5c42c16450a0d0389ead7e142f4981b0 SHA-256: faa42681807450afc769c91f8501892b72cb7a5829c6430b66c812be6f48da92
92 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links to external websites, many of which follow a similar numeric or slug-based pattern, suggesting a link farm for SEO manipulation or malware distribution. The document body, though heavily obfuscated, contains references to 'mandate form epass' and the wkhtmltopdf generator, indicating a potential lure. The ML classifier strongly flagged this PDF as malicious, and the presence of a large number of external links supports a malicious intent, likely phishing or directing users to 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://wcd-qnv77h4.mgh-r.ch/uploads/1/3/0/7/130776229/130776229.html#mandate+form+epass
    • http://www.artillerousa.com/uploads/1/3/0/3/130323542/jepejaramavujogiso.pdf
    • http://ucqclothing.com/uploads/1/3/0/5/130539204/5becb9.pdf
    • http://www.myremio.com/uploads/1/3/0/7/130776078/kiwosazesebesat-folimokivasimob.pdf
    • http://www.sbcollections.co.uk/uploads/1/3/0/7/130776519/leduzijugarelin.pdf
    • http://smokymountainhempcbd.com/uploads/1/3/0/6/130639251/duzax.pdf
    • http://insomniart.com/uploads/1/3/0/6/130603834/tezije.pdf
    • http://www.heartlandchurchnetwork.org/uploads/1/3/0/7/130738714/bojupiboletuludoga.pdf
    • http://www.1cfa.co/uploads/1/3/0/4/130489346/lojoxofut_puxinazogij_wulige_wixajifigijaf.pdf
    • http://sarahsegesdy.com/uploads/1/3/0/4/130483514/jekafilafudajewobi.pdf
    • http://hotorgrot.net/uploads/1/3/0/8/130814877/28ccb8d3df5028.pdf
    • http://www.liridologue.fr/uploads/1/3/0/4/130476519/vesin_juwovujekef_zikeraleves_zorexumuwuwot.pdf
    • http://www.healthybodiesmindsleaders.com/uploads/1/3/0/8/130814200/kolotalerib_duxavonopevo_pobobevol_nefafir.pdf
    • http://quantsentry.com/uploads/1/3/0/6/130639936/mabevepunavi.pdf
    • http://tablechurch.org/uploads/1/3/0/3/130323115/1073505.pdf
    • http://www.sherrytalkradiotranscripts.com/uploads/1/3/0/3/130379653/xadidopige.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_off00006c73.bin
d822fea6806953dd6fe95b55407012045ae2581d7e3ad1a88330b754bb43d6c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C73 8316 bytes

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