Malicious PDF — malware analysis report

Static analysis result for SHA-256 d971dd5b73538728…

MALICIOUS

PDF

38.1 KB Created: 2020-04-07 11:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d97515967792cf5a8fdb9949d0de9fa0 SHA-1: b7149d76d946446c54cb5f5a6b2f265341df80dc SHA-256: d971dd5b73538728f1434d636242f531a218606a2842c3fe63c3bd2a313c4797
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to similarly structured URLs on different domains, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, contains text related to an adoption request form in Mexico, likely serving as a lure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://laureneg.com/uploads/1/3/1/3/131384286/131384286.html#formato+de+solicitud+de+adopcion+en+mexico
    • http://tjsroadservice.com/uploads/1/3/0/3/130379462/14e4c8.pdf
    • http://faithanddemocracy.com/uploads/1/3/0/3/130313306/xumekojolabat.pdf
    • http://troop14holliston.com/uploads/1/3/0/6/130639452/kurejefabotorod-noxuwokugad.pdf
    • http://vivemediaproductions.com/uploads/1/3/0/9/130969714/4844132.pdf
    • http://vpn-connection.com/uploads/1/3/1/3/131379326/figujixafaju.pdf
    • http://107islandjam.com/uploads/1/3/0/6/130605259/5655476.pdf
    • http://newrootscharter.org/uploads/1/3/0/2/130288465/nupawosuk.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_off00006812.bin
a2f694e6d148c9a1b6aad4184e3f26b94cace616c327f6fb42eeebed70d6bd53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6812 9440 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.