Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bedff667c7c802f…

MALICIOUS

PDF

42.4 KB Created: 2020-04-07 04:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c443a04060c9437a1189b9a9bb69b15f SHA-1: ee4648678b4680f7600b86cffa9874a7ba9444f3 SHA-256: 4bedff667c7c802f78d616bfd161a257ce35824c5b37990ecb0207675e356bbc
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 spam tactic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a video, suggesting a phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of this PDF.

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://hardknoxrocksexcavating.com/uploads/1/3/0/2/130288602/130288602.html#heart+and+soul+piano+duet+video
    • http://sistassalon.com/uploads/1/3/0/7/130776033/3725460161f4d7a.pdf
    • http://jessieswift.com/uploads/1/3/0/8/130814407/b8d894ea93.pdf
    • http://christianawt.com/uploads/1/3/0/5/130543771/c4aea6421dc26a.pdf
    • http://adamwlevy.com/uploads/1/3/0/5/130588931/5447455.pdf
    • http://scubasassphotography.com/uploads/1/3/1/4/131454237/merefedukuxe-wowipenejo-zopevixalam-limep.pdf
    • http://massagelogicspa.com/uploads/1/3/0/3/130323148/2823093.pdf
    • http://twsimports.com/uploads/1/3/0/6/130639045/roxuziwowupivoboxim.pdf
    • http://ayearinthehills.com/uploads/1/3/0/4/130488483/9637802.pdf
    • http://awakenedpaths2.com/uploads/1/3/0/5/130588230/noruwazomadaro.pdf
    • http://sebastiananis.com/uploads/1/3/0/7/130775251/budoletukikul_kikuz_rirekij_teserije.pdf
    • http://laroseartclasses.com/uploads/1/3/0/5/130539897/18c82e8a1b4.pdf
    • http://adamwlevy.com/uploads/1/3/0/5/
    • 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_off00007949.bin
6228bad41d300b4729f5bc9f30fb7880db07ffb57e8db45e16f0645e10c7475f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7949 9380 bytes

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