Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6be811d585b7d69…

MALICIOUS

PDF

38.5 KB Created: 2020-04-06 11:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bc15658ea218e5b1cc0c4127ae1b0a89 SHA-1: 8da63b5873ba503504f6b4230b184535719ea73d SHA-256: f6be811d585b7d692dd39855512d3abfb34c61efaa85e27dadfa27142f899d81
92 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are SEO-optimized and point to other PDF files on various domains. The primary purpose appears to be to direct users to a link farm, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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://bournewarriorstc.com/uploads/1/3/0/2/130287938/130287938.html#oakland+human+resources+consortium+job+board
    • http://freemoldtestingflorida.com/uploads/1/3/1/3/131398597/fobafe-jejaletapu.pdf
    • http://withlovehairco.com/uploads/1/3/0/7/130739893/doxufe_lazefepasuda_tewov_xamitedak.pdf
    • http://southmountainbattlefieldguide.com/uploads/1/3/0/6/130639294/666026.pdf
    • http://oaklandtocollege.org/uploads/1/3/1/4/131407111/6310363.pdf
    • http://kanehsatake.ca/uploads/1/3/0/6/130639222/samukusasedanuxukid.pdf
    • http://streetwiseconsultinggroup.com/uploads/1/3/0/5/130550869/wuzowiweves_revuwiwov_ropanememoxuf.pdf
    • http://powerhousedesigngroup.com/uploads/1/3/0/8/130874612/345ce7b89.pdf
    • http://sarahshrieves.com/uploads/1/3/0/2/130274263/putotubufodij-sokiz-gelozipuji-kotebipima.pdf
    • http://geffreisen.net/uploads/1/3/0/5/130545278/7507933.pdf
    • http://saltcuredapparel.com/uploads/1/3/0/5/130590666/kiraneronamikaz_vapedal_mitutewama.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_off00006eb8.bin
073098f3ea0fb841cc06170f3b374f1a7b6a62ae654fde94e92bab7555a3afd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB8 7692 bytes

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