Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad13fec7585c28fe…

MALICIOUS

PDF

42.1 KB Created: 2020-04-07 11:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 705d6262e2e7fbba8fd1df29500bd139 SHA-1: 13e6476629906fb86884cec8bb6aa90f053056e7 SHA-256: ad13fec7585c28fe23b9efd6b89a18e2042241ae47c686cdafd2489194afc5fb
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This suggests the document is part of a link farm or SEO manipulation scheme, designed to drive traffic to a network of sites. The document body itself is heavily obfuscated, but the presence of URLs and the 'PDF_SEO_LINK_FARM' heuristic indicate a malicious intent to redirect users. No scripts were extracted from this sample.

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://clarksvilletlc.net/uploads/1/3/0/6/130604748/130604748.html#formula+perimetro+y+area+del+romboide
    • http://andreachurchillbooks.com/uploads/1/3/0/5/130540009/764975.pdf
    • http://www.msdanielledobeleit.com/uploads/1/3/0/4/130476417/jenisiv.pdf
    • http://trainandtransform.info/uploads/1/3/0/6/130604150/c51e4b742e686e5.pdf
    • http://tribaltigers.com/uploads/1/3/0/3/130313180/f1c74b7006e9e.pdf
    • http://vibinwithvanessa.com/uploads/1/3/1/1/131164574/rozewupidutesowaxoka.pdf
    • http://win27.org/uploads/1/3/1/3/131384492/diladefogix_godok_polivitaj.pdf
    • http://maryandtux.com/uploads/1/3/0/6/130621337/kodofowedisazi-worazodurorax.pdf
    • http://thedataceo.com/uploads/1/3/0/5/130589305/vozidipodotep_nitagunojekel_xewekukika.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dd0.bin
438facb7cb8763ae1e17714688d3c6580854fa052e1310e82ab316b4751bbc65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD0 8992 bytes
font_01_sfnt_off00008e87.bin
c048ac4ed90d63bfae46472f65f9cf6fc0bd5e75369f2d8f28771a6d96a2731c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E87 3156 bytes

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