Malicious PDF — malware analysis report

Static analysis result for SHA-256 e710f8aa2204987c…

MALICIOUS

PDF

30.0 KB Created: 2020-04-16 16:39:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bfc7e66a45292c066081aeaea0fa606a SHA-1: 8e6e2b5a0ab4edfef5b3cb78d3a4daf4f242db73 SHA-256: e710f8aa2204987cdd61525141a68811460ee8c8a989e2845f082d9275a7fd72
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO link farming or to distribute malicious content. The ML classifier strongly indicated maliciousness. The embedded URLs suggest a campaign to drive traffic to these linked documents, which may host further malicious payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mrdbmitchell.com/uploads/1/3/0/7/130775997/130775997.html#aroma+espresso+bar+menu+pdf
    • http://therisingsuncottage.com/uploads/1/3/0/6/130604391/4831171.pdf
    • http://ampeer.io/uploads/1/3/0/7/130738697/magazomibumokapesilo.pdf
    • http://k-laser.eu/uploads/1/3/1/4/131438622/pilizadeka.pdf
    • http://post.directory/uploads/1/3/1/6/131606260/be43472.pdf
    • http://xxlleague.com/uploads/1/3/1/4/131483152/kavumobosez.pdf
    • http://drunktourssf.com/uploads/1/3/0/6/130604377/228881.pdf
    • http://ourhomepetcaretx.com/uploads/1/3/1/4/131452963/kuzixepoxomube.pdf
    • http://mindyourbs.com/uploads/1/3/0/5/130590719/cef923.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_off00005022.bin
786e3286d5ec0b6b05bd78dd06ebc09909ea0e1be045cdbd087cedaaed043e8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5022 7076 bytes

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