Malicious PDF — malware analysis report

Static analysis result for SHA-256 964e407a18aa0c24…

MALICIOUS

PDF

37.0 KB Created: 2020-06-01 08:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31124d2aef37fd299f6e3ffce82d3b7c SHA-1: 8ee825194bd2b182808f8f42ef5c190d80bf039e SHA-256: 964e407a18aa0c24e84f98b3d68cc0adc8e59aa177a17bffbec98c71f513524f
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on WordPress subdomains. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm. The document body, though heavily obfuscated, contains references to 'Traveller rpg wiki' and the URL http://fairwaydrainage.com/uploads/1/3/0/4/130494389/130494389.html, suggesting a lure to external content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://fairwaydrainage.com/uploads/1/3/0/4/130494389/130494389.html#traveller+rpg+wiki
    • https://porugisi.files.wordpress.com/2020/05/wakoduvadeniganuwore.pdf
    • https://wotilebuf.files.wordpress.com/2020/06/16003135121.pdf
    • https://binutizazal.files.wordpress.com/2020/05/voponituzanelu.pdf
    • https://vaferururane.files.wordpress.com/2020/05/bizosurabid.pdf
    • https://babesakaj.files.wordpress.com/2020/05/rudofutusije.pdf
    • https://wadexirem.files.wordpress.com/2020/05/73123893766.pdf
    • https://fisajisekik.files.wordpress.com/2020/05/77826175604.pdf
    • https://jawajadepoj.files.wordpress.com/2020/05/90066071508.pdf
    • https://povaduw.files.wordpress.com/2020/05/dodituxarinatirularu.pdf
    • https://nolegibi.files.wordpress.com/2020/06/kewenitatiwife.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_off00006450.bin
f739fad5e55a2b6b4f0df12f6a833e10a09cd3d7ebd38abfd279702d58d0667f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6450 10920 bytes

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