Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4e9137903c1a44…

MALICIOUS

PDF

38.0 KB Created: 2020-04-02 22:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: aa67ba6675a5dcae135fb0e7bcb9863d SHA-1: 692a02c3b01a1028a3bee3816054459a3c0baa8c SHA-256: 8e4e9137903c1a444bd28435bbd4e68c8df46c3ca354d8ce748eb8752a66053b
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files hosted on various domains. This suggests the document is part of a link farm operation, likely intended to manipulate search engine rankings or distribute further malicious content. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates malicious intent.

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://mrspiacentini.com/uploads/1/3/0/6/130620633/130620633.html#divinity+original+sin+2+workshop
    • http://primeessentials.ca/uploads/1/3/0/5/130539260/wopazemulejesa.pdf
    • http://lenorabeam.com/uploads/1/3/1/1/131164238/bataza_lobej_satituzop_jefez.pdf
    • http://jsmythdesigns.net/uploads/1/3/0/6/130621439/b450503f89b.pdf
    • http://homebasecommunity.org/uploads/1/3/0/4/130483772/2d21217fc7d675.pdf
    • http://theeljefe.com/uploads/1/3/0/5/130588906/5509909.pdf
    • http://reasonerstorussia.com/uploads/1/3/0/6/130604557/wifutisimalezax-bunikixobenorev-gerobegubovo-bavusigowepamar.pdf
    • http://eliseimages.com/uploads/1/3/0/7/130775666/zubixegudijovap.pdf
    • http://squar3d.net/uploads/1/3/0/4/130476396/8795e29.pdf
    • http://momentousliving.org/uploads/1/3/0/6/130604789/mugupovavi_gevigoxutu_dadoweli.pdf
    • http://disfranchise.com/uploads/1/3/0/5/130589293/rawuwibagedokuwok.pdf
    • http://custobran.com/uploads/1/3/1/4/131483685/fbdf0.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_off00006b3b.bin
ee9d1d4f713c208dca0cec9d36c9e6633f5a784a8f952d9056c8f766730b8ad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3B 8376 bytes

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