Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef5e684993c6caa…

MALICIOUS

PDF

34.3 KB Created: 2020-04-24 15:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9d0428bacdd5be539bb687023be8217f SHA-1: 4a0656dc11179dc2dfd3a983d7ce8aa1cd7710ce SHA-256: aef5e684993c6caa04270861549a1e80cdb05ecc18491712cfbb01fb174c94ff
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on similar domains. This behavior is indicative of a link farm or SEO spam technique, likely intended to drive traffic to malicious or compromised websites. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://designproinnovation.com/uploads/1/3/1/3/131398182/131398182.html#project+portfolio+dashboard+template+free
    • http://seartiststudio.com/uploads/1/3/1/4/131437045/1232323.pdf
    • http://raeyxia.art/uploads/1/3/1/4/131438348/4502445.pdf
    • http://abarrancophotos.com/uploads/1/3/0/5/130589427/9580866.pdf
    • http://xparaphernalia.com/uploads/1/3/0/9/130969437/wifuxavo_nodefev_bugoxodenifowe_zononuk.pdf
    • http://overstockoutletstlouis.com/uploads/1/3/0/8/130814643/keduxid.pdf
    • http://daviddemondphotography.com/uploads/1/3/0/8/130874018/9167892.pdf
    • http://studentessayproofreading.com/uploads/1/3/1/4/131408172/binijux.pdf
    • http://abarrancophotos.com/uploads/1/3/0/5/130589427/9
    • 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_off00006012.bin
24ccbe7843bbb7642768e5b1cbd1ca35e9a4360b27ef8fa5165db39f7f053ec2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6012 7400 bytes

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