Malicious PDF — malware analysis report

Static analysis result for SHA-256 b641907688e26e7f…

MALICIOUS

PDF

39.3 KB Created: 2020-04-17 05:37:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c02b80fade47a3a9a412a7cb54d2d80a SHA-1: 652a852ee4c6b7e4b55369d6254772a6cdd455d7 SHA-256: b641907688e26e7fd702ed833bdd51f5363597ea05c37bb7d1727193ff392ba0
92 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, containing numerous external links to other PDF documents. The document body, though heavily obfuscated, includes a URL that appears to be part of this link farm. This technique is often used for SEO manipulation or to distribute malicious payloads through a chain of redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://rachelsoaneescort.com/uploads/1/3/1/4/131438111/131438111.html#ornamental+fish+farming+projects+pdf
    • http://trstransporte.com/uploads/1/3/0/7/130739936/6592730.pdf
    • http://abouthound.com/uploads/1/3/0/7/130739910/1687438.pdf
    • http://thehair.com/uploads/1/3/1/1/131163635/dowuridivomuje.pdf
    • http://arborwoodpartners.com/uploads/1/3/0/8/130813373/rurawiveko.pdf
    • http://doorrushfour20.com/uploads/1/3/0/7/130738847/e913b5547b1d2.pdf
    • http://angelsofhopecenter.com/uploads/1/3/0/6/130620854/takedevakaromus.pdf
    • http://studioshiuli.com/uploads/1/3/0/5/130550772/gararigakanitozili.pdf
    • http://eventsbynicole.net/uploads/1/3/0/5/130539373/nekov.pdf
    • http://theroyalchandlery.com/uploads/1/3/0/5/130545895/103944f4f64.pdf
    • http://vertacc.ca/uploads/1/3/1/4/131437657/59add0aa4df81.pdf
    • http://silverandevergreen.net/uploads/1/3/0/6/130621429/dowafusitof.pdf
    • http://jennybandyoils.com/uploads/1/3/0/3/130313390/lowonivirodut_wukuv_vusoxixo.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_off00007379.bin
48e1b45b1325247739a0278b605f515f5a0ed0c5d411c539d20e5fa0628b86e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7379 7584 bytes

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