Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff6f1e88b3bd3f8…

MALICIOUS

PDF

43.0 KB Created: 2020-03-30 23:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 036e9ce7d534c83d737031e3bc0a4516 SHA-1: c3cfe3b14f84da46f6903788a5e517771c9cb22c SHA-256: fff6f1e88b3bd3f8d728ac38062c81e35720389dbc368b4223413f1a714491be
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on various domains. The document body, though heavily obfuscated, contains a URL that appears to be a lure for nutritional information. This suggests a link farm or SEO poisoning tactic to drive traffic to malicious sites. The ML classifier strongly indicated maliciousness.

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://artani360.com/uploads/1/3/1/4/131483044/131483044.html#krispy+kreme+chocolate+glazed+nutrition+info
    • http://elohimsworld.org/uploads/1/3/0/4/130435516/2917176.pdf
    • http://dragonnestenclosures.com/uploads/1/3/0/6/130639508/54fac0614c710.pdf
    • http://robinsnestfunraiser.org/uploads/1/3/0/6/130621829/dcd6c4fec98d6.pdf
    • http://annieautosales.com/uploads/1/3/0/4/130435658/1197918.pdf
    • http://sundownmusical.com/uploads/1/3/0/9/130969855/mifejikuxotexi_wawalujuxatozi.pdf
    • http://surgicoordinator.net/uploads/1/3/0/8/130874111/jovinewumojemazer.pdf
    • http://sbprocast.net/uploads/1/3/1/3/131384099/tafarojufinowivan.pdf
    • http://empowermentinnovationlab.com/uploads/1/3/1/3/131383764/938486.pdf
    • http://hollymcree.com/uploads/1/3/0/8/130874634/3541573.pdf
    • http://treeremovalfortworth.com/uploads/1/3/0/6/130604022/5443978.pdf
    • http://gokevinpoe.com/uploads/1/3/0/6/130604919/xupuxatorasevikenoto.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_off00007e97.bin
1ba737cbb82a8950eb3462f35d8a2c8f000cbda9f7043ff7567d826229b2e787		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E97 8396 bytes

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