Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec276259fd95f7f…

MALICIOUS

PDF

38.5 KB Created: 2020-04-19 11:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 75ab6f9389a572f10a3150c8f90cdf39 SHA-1: c6d28ebb5abaf6bc6e57e018188e1e94a7ee40b6 SHA-256: 0ec276259fd95f7fc5929e83ddc7ffa99c37388924917da8e2a240dedb21a809
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, suggesting an attempt to redirect users to potentially malicious websites. The ML classifier strongly indicates malicious intent, and the presence of embedded URLs further supports this. While no scripts were directly extracted, the PDF structure and heuristics point towards a malicious document designed to leverage external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://911flex.org/uploads/1/3/0/5/130589020/130589020.html#belly+dance+flute+music
    • http://mariageronimo.com/uploads/1/3/0/6/130639517/67545ddbf.pdf
    • http://viverofloresdelperu.com/uploads/1/3/0/8/130814227/ec46d92920.pdf
    • http://storybrooksentertainment.com/uploads/1/3/0/8/130873962/lesiniwuvimur.pdf
    • http://rochialvarez.com/uploads/1/3/0/8/130873830/jutunipezulo.pdf
    • http://blaquehippie.com/uploads/1/3/0/3/130323409/509548.pdf
    • http://goldclubevents.com/uploads/1/3/0/7/130775196/86437fd24.pdf
    • http://christjesusordainedministries.org/uploads/1/3/0/6/130621973/xexalug.pdf
    • http://willardenvironmental.com/uploads/1/3/1/3/131384589/8707445.pdf
    • http://alaskansuntanning.net/uploads/1/3/0/6/130639440/zosasafima.pdf
    • http://600bst.com/uploads/1/3/1/1/131164173/7863651.pdf
    • http://ericscottwrites.com/uploads/1/3/1/4/131406386/dakolejemezufa.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_off00006e47.bin
7536bcce44c53730bb299ea2428e2d3a3ebad499fb04697703f184616aa26536		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E47 7832 bytes

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