Malicious PDF — malware analysis report

Static analysis result for SHA-256 800c2f5d296e1f69…

MALICIOUS

PDF

66.8 KB Created: 2021-06-08 16:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05806dbed39f8a658dcc6e0afdd11ed7 SHA-1: 771a3d9a6cd487400589c43d2576c267ba8dc0bf SHA-256: 800c2f5d296e1f698639ab615bb45df7753ab1d3765697e3cdaa5f70ce71085d
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8307

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://queure.ru/uplcv?utm_term=complex+and+compound+sentences+pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160928748dd7b8---zasen.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/1b4a112b9cbc19b6b427fda647e2a4ef/3866342496.pdf
    • https://eqonetech.com/upload/userfiles/files/nades.pdf
    • http://dzbnf.com/upload/file/%5C/pagixoxizav.pdf
    • http://www.toeterloeh44.de/files/gagekozopevakuwigoderufiw.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a0f2e8177c2f7add9e1ac81eaf119f6c/50789324992.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e84dd16306---nizofes.pdf
    • http://ebsenglish.net/_UploadFile/Images/file/difituvoseruwutoxomevivem.pdf
    • https://artbynela.com/uploads/file/83081593728.pdf
    • http://abacusnancy.com/userfiles/file/nofagafufesiroxale.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/14a4c5b5d61eb8f21337d9e1707e0dcc/8597067955.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/d40711a3bb8f2e7a4edcb2294bb4cea7/mulenar.pdf
    • http://amandatravel.com/userfiles/file/tetesibevusavebowixeped.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/5oa9m7qrtt8ts6r9493hcf1nf3/regibewozuwizu.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/2ab0b22c873d728f16fe90b8d0a42d12/rokovi.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3a0dac18c---fazegotegami.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e426.bin
2ca1cab17e8f2d0b7fe8901ab0144d05bcde113f469cb5808001af8a691ee14f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE426 5180 bytes

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