Malicious PDF — malware analysis report

Static analysis result for SHA-256 46fd23ce907ed732…

MALICIOUS

PDF

37.7 KB Created: 2020-06-03 20:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05c675f6335a938b24f2e0fc9bb443a8 SHA-1: 777158cf023d6d029656bee0a0852720658d3342 SHA-256: 46fd23ce907ed732eea65ef4c99396b7061eec9094906240dbc814578cd93ec1
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on compromised or unrelated domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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://2x0.undesirable.us/uploads/1/3/0/5/130541064/130541064.html#harrison+internal+medicine
    • http://whitzellroofing.com/uploads/1/3/0/7/130776215/dc8769e257172.pdf
    • http://kidscaninvest.com/uploads/1/3/0/4/130476370/mobagetabubipum.pdf
    • http://themobilereport.com/uploads/1/3/1/0/131070009/vafejenikuv.pdf
    • http://jdsenergyservices.com/uploads/1/3/0/6/130604798/7592798.pdf
    • http://365waterproject.org/uploads/1/3/1/8/131872137/459f8.pdf
    • http://relentlessaudio.com/uploads/1/3/0/8/130813987/duzalipozupa.pdf
    • http://cultivatingbalance.net/uploads/1/3/0/5/130589088/pilud.pdf
    • http://rockcityfilmcrew.com/uploads/1/3/0/2/130287407/60a39.pdf
    • http://mta-sts.mail.fccbusiness.com/uploads/1/3/0/5/130552053/2ab9f.pdf
    • http://cpt-serviced.co.uk/uploads/1/3/0/9/130969618/jamide.pdf
    • http://2x0.undesirable.us/uploads/1/3/0/5/130541064/terms.html
    • http://2x0.undesirable.us/uploads/1/3/0/5/130541064/dmca.html
    • http://2x0.undesirable.us/uploads/1/3/0/5/130541064/policy.html
    • https://kidumasob.files.wordpress.com/2020/05/62356102791.pdf
    • https://dameniv.files.wordpress.com/2020/05/subutuvupejeb.pdf
    • https://limamav.files.wordpress.com/2020/06/81717914243.pdf
    • https://sumexarit.files.wordpress.com/2020/05/newulobur.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_off00005f69.bin
3896675e60c8bae07a1cd9ddfa0828e3559cecd65d618e764f81bac3d8dd02f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F69 18332 bytes

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