Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a65b96684a9b65…

MALICIOUS

PDF

41.7 KB Created: 2020-04-09 12:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4e391732cb20163c3f1553ac51cf92a2 SHA-1: 23f46a1ff4f9ea942de3c0a8a02fb2601467c52d SHA-256: 83a65b96684a9b6538e6159cf9e6f3e13e25ca9dbe9f04f6d48a3e494413b95e
62 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, contains text related to a treadmill manual and references to wkhtmltopdf, suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting users to a series of potentially malicious websites.

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://raquelwilliamsonline.com/uploads/1/3/0/5/130540010/130540010.html#proform+995+treadmill+user+manual
    • http://boulderoffroad.com/uploads/1/3/1/4/131406885/wunemanamerivewuvi.pdf
    • http://goatmt.com/uploads/1/3/0/5/130588484/4811bb102b.pdf
    • http://rebeccabeshara.com/uploads/1/3/0/6/130620637/1ed8a10198d.pdf
    • http://saskiarooijakkers.com/uploads/1/3/1/3/131381036/bukukibugawabu.pdf
    • http://kartha-br.com/uploads/1/3/0/6/130620173/gozuxop.pdf
    • http://opholding.com/uploads/1/3/0/4/130489446/a09976513ff.pdf
    • http://tomshelstad.com/uploads/1/3/0/2/130289640/fadaxowiwel-teradibi-goxuxigofonoruv.pdf
    • http://550kirklandway.com/uploads/1/3/0/2/130272325/f54e913.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_off000062dd.bin
bb12aab5f7d2cfbff9a465090a62a009a2f741e206c191909a176bdd129bb20e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62DD 8896 bytes
font_01_sfnt_off000084cc.bin
af19efb7a9162253415e60a41a822d39fca3be1f9d7a7d9fc69485b6262265ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84CC 16068 bytes

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