Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef06c3213d5ea7b1…

MALICIOUS

PDF

46.2 KB Created: 2020-04-05 13:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9bafe332f53be114a8842a603bafe9d2 SHA-1: 0b11a214163c1cdda1ed5b589b70420c198603f2 SHA-256: ef06c3213d5ea7b13a09b2b3ad13c9f8fa5566008c6800f080af758057d31bbf
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which are structured as SEO-optimized PDF lures. The document body, though partially corrupted, contains text related to 'Fluidoterapia en perros con parvovirus' and references wkhtmltopdf, suggesting a deceptive lure to drive traffic to a network of linked sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious linking behavior.

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://bladonbooksandcollectibles.com/uploads/1/3/0/7/130739156/130739156.html#fluidoterapia+en+perros+con+parvovirus
    • http://vipneurorehab.com/uploads/1/3/0/4/130476401/2605547.pdf
    • http://ironcladnw.com/uploads/1/3/0/5/130540209/462944.pdf
    • http://besoulstrong.com/uploads/1/3/0/9/130968981/01c84a037e5.pdf
    • http://lifeofamamma.com/uploads/1/3/0/8/130814584/bb776a4217b.pdf
    • http://jlmjustlikemommyaccessories.com/uploads/1/3/0/2/130270931/guvoxelari.pdf
    • http://radmanusa.com/uploads/1/3/0/5/130588982/4020679.pdf
    • http://livebetter-livehealthy.com/uploads/1/3/0/9/130969946/nifago.pdf
    • http://alloneocean.com/uploads/1/3/0/4/130436037/debebuvifig.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_off000089d3.bin
48628ba6bc752ad7e7f311b8ab5da909374dee1674508b67626c1bf53a3077c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89D3 9000 bytes

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