Malicious PDF — malware analysis report

Static analysis result for SHA-256 493ab13163b9362d…

MALICIOUS

PDF

48.2 KB Created: 2020-04-13 00:00:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b1c229b16cc6fcca044e6520f93f4525 SHA-1: a930b359708c685f6a5bffa9b93a93a4af3c1351 SHA-256: 493ab13163b9362d96cfba446bb3f3548e56adbbfa1934027230e1ecf4a5ef3c
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named PDFs, indicative of a link farm or SEO poisoning tactic. The document body, though partially obfuscated, contains text related to 'Seniat consulta rif persona juridica' and references the wkhtmltopdf tool, suggesting a lure to a fake Venezuelan tax consultation service. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to potentially malicious external sites.

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://seanpatrickwobrien.com/uploads/1/3/0/5/130551130/130551130.html#seniat+consulta+rif+persona+juridica
    • http://bibicapital.com/uploads/1/3/0/8/130873830/9872131.pdf
    • http://carloslandscapenapa.com/uploads/1/3/0/3/130379316/5162610.pdf
    • http://bloom-yourownway.com/uploads/1/3/1/3/131398291/wozaziro.pdf
    • http://thegoodstream.com/uploads/1/3/0/2/130289510/todor-xipexasedezu-kopadulifaxo.pdf
    • http://reasonablewrestling.com/uploads/1/3/0/3/130323478/c790d1695fa267e.pdf
    • http://exmoorsec.com/uploads/1/3/0/6/130621751/wigokavu.pdf
    • http://ninamire.com/uploads/1/3/0/6/130603769/9ef7c6afb055.pdf
    • http://together.farm/uploads/1/3/0/6/130621654/gutipe-pujogebexeluxez.pdf
    • http://solidificationtech.com/uploads/1/3/0/7/130775472/1829992.pdf
    • http://cirquehamelin.com/uploads/1/3/0/5/130547405/jikizivewekimox.pdf
    • http://jolynstest.com/uploads/1/3/0/6/130621709/4845083.pdf
    • http://minnieripertonfund.org/uploads/1/3/1/1/131163725/1894500.pdf
    • http://x-raymusic.net/uploads/1/3/1/3/131378806/moxuwukaginowe-bomazimileteno.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_off0000936e.bin
9f2c18d68fc1d63f0c2a0438c818470a88c1a6e397df57e6fc76cf7cfcf9f0a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x936E 9168 bytes

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