Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfccb31042500f22…

MALICIOUS

PDF

37.8 KB Created: 2020-06-21 09:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58b249afe593815e5cf1912632437b34 SHA-1: d809fc66c62526f2955f68a3b7c36fd79b01ef86 SHA-256: dfccb31042500f2208cd6e65ef42ab4114451fbe775a1021c30cf0536fa952eb
62 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 point to other PDFs with numeric slugs, indicating it is part of a link farm. The document body is obfuscated but contains references to a Mitsubishi Electric manual, likely a lure to encourage clicks. The primary function appears to be distributing other malicious content via these links.

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://icion-roadshow.com/uploads/1/3/0/7/130776483/130776483.html#mitsubishi+electric+par-21maa+manual
    • http://edgrowthgroup.net/uploads/1/3/1/4/131437931/51fc939d4f160.pdf
    • http://baileesbest.com/uploads/1/3/0/6/130605230/fusavalujak-navomazuwudob-nunuz-tejudigowipaga.pdf
    • http://madickman.org/uploads/1/3/0/7/130740610/c579e1ce0dddb1d.pdf
    • http://maggieshousevalues.com/uploads/1/3/0/6/130620628/xefipelexenazope.pdf
    • http://mta-sts.mail.printsdoneright.com/uploads/1/3/1/3/131381681/c956af43bc5.pdf
    • http://psn.smartkomweb.no/uploads/1/3/0/7/130776702/decebb78.pdf
    • http://webdisk.smartfrogquilting.co.uk/uploads/1/3/1/4/131454305/bixiwevuzukupof-satizajekive-kudorexoranen-limowat.pdf
    • http://i-405corporatecenter.com/uploads/1/3/0/7/130775567/regowod.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000410b.bin
88cda9c812cc3388c6d18da9d58d88c5f439817f0cef334f194ff76037a58abd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x410B 5308 bytes
font_01_sfnt_off000052ef.bin
9c8d19ad9f018a018757064cf41bd63495e4b92a9f5b8e84ce98474a365091b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52EF 10076 bytes
font_02_sfnt_off00007561.bin
16841cd06245dfab0499788473f9c5e49459ecbf5940b4b59b8708d0fa28d68c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7561 16196 bytes

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