Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff530e58455226ab…

MALICIOUS

PDF

33.9 KB Created: 2020-05-23 16:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfecc0dda55de6537eed1c759bff216c SHA-1: a9b3d8a961eeb930e127811f5014338734bac14d SHA-256: ff530e58455226abf628561e169a965a05dec6f0e888305932b9280f25b5cc99
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, a technique often used for SEO manipulation or to distribute further malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this pattern, indicating a malicious intent to redirect users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of numerous external links is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://cruisingcrazy.voyagerwebsites.com/uploads/1/3/0/4/130436188/130436188.html#homelite+mightylite+gas+leaf+blower
    • http://thesmileylj.net/uploads/1/3/0/4/130483825/suzakukaruzegire.pdf
    • http://americanpaws.org/uploads/1/3/0/5/130543092/3811805.pdf
    • http://melodiousstringsstudios.com/uploads/1/3/1/4/131406826/difonefirizowulukal.pdf
    • http://ecobestie.org/uploads/1/3/0/7/130739513/zavepanobizedisejiw.pdf
    • http://buckeyemoldtesting.com/uploads/1/3/0/5/130588875/cf107ca85a775.pdf
    • http://whitestractorparts.com/uploads/1/3/0/5/130551456/2023861.pdf
    • http://duralumsiding.com/uploads/1/3/0/5/130542872/jalol_xuvad_dazukinosowipe.pdf
    • http://heslerco.com/uploads/1/3/0/5/130550868/7275469.pdf
    • http://eccevideos.info/uploads/1/3/0/3/130323479/9153661.pdf
    • http://charmprintingus.com/uploads/1/3/1/0/131070590/2178136.pdf
    • http://pradallaw.fr/uploads/1/3/1/0/131070940/gozut.pdf
    • http://money-works.nl/uploads/1/3/0/4/130477192/6f23df8.pdf
    • http://oneidalakehomerenovationandinspections.com/uploads/1/3/1/3/131384696/8308221.pdf
    • http://laurajentertainment.com/uploads/1/3/0/6/130620280/tubibojuzewi.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_off0000591f.bin
3764c97458b761a0ce22c4ef1db66ebac6ff006867be21d1e116f9fc9512511a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x591F 10176 bytes

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