Malicious PDF — malware analysis report

Static analysis result for SHA-256 610484ce34854fa8…

MALICIOUS

PDF

32.2 KB Created: 2020-04-12 04:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 58d6f2f970a76e0ade0e298a8f5fcc2a SHA-1: 0a36ac803d2803d80f952110a326ab3bfd05e168 SHA-256: 610484ce34854fa8b7283a8a188866337871d3c3af4f37eca99c6003e36dc257
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body includes a Spanish phrase and references wkhtmltopdf, suggesting a potential lure or redirection mechanism. The primary intent appears to be directing users to a network of linked websites, possibly for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://thealmostenoughwoman.com/uploads/1/3/1/4/131482930/131482930.html#te+pague+con+la+misma+moneda+francy+letra
    • http://biggsandcompany.org/uploads/1/3/1/3/131384396/5080463.pdf
    • http://msdixonart.com/uploads/1/3/0/6/130620660/8b17aa00803.pdf
    • http://cheftaylorreilly.com/uploads/1/3/0/7/130740118/8922337.pdf
    • http://mendozachiropractics.com/uploads/1/3/0/4/130488197/suvetumejoka-miropasuvu-zegogapip.pdf
    • http://aquentiumsolar.com/uploads/1/3/0/2/130289719/detodorimokidixi.pdf
    • http://dpvavote.com/uploads/1/3/0/5/130540281/tujusukepuno.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_off00005435.bin
1d05c43cea615c05ab13536e143fb7f117981018a051206a72a624cf01ca8a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5435 8692 bytes

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