Malicious PDF — malware analysis report

Static analysis result for SHA-256 694493af6967a691…

MALICIOUS

PDF

70.7 KB Created: 2021-06-02 09:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 677d69f682a23322c97dee6f0bedbd96 SHA-1: 5fd6be744869884f09d757d3a18b459df9fbca97 SHA-256: 694493af6967a69115699f41ce016b9aa3ade0cb2aa6a06b251d324f1f5de272
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, specifically within form upload plugin directories, suggesting a tactic to host and distribute malicious files. The presence of a link farm on disposable hosting further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9679

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 http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf8f5f3651---20230767765.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/631eba74b9407226596254e8317e3ebf/78408250285.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/6790b3db512c129bcc8a9c2894216a87/61688372492.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/ed3bdab35dee0cbca9183d386d8f4c51/38447640054.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/1tskfg8pf494b491smpr12fd75/fesanozubesabe.pdf
    • https://cristalensi.com/public/File/34619037800.pdf
    • http://ctyrkolky-gamax.cz/data/dokumenty/10327504870.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0edd94933---1761770619.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160747b9e41cae---56585110520.pdf
    • http://przychodnia-felinskiego.pl/uploads/editor/file/38485279555.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076147d6743d---pajimopemip.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/1iqu5lsgavg3knfu15ra6qm496/ravogafinixuwewif.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afde9e1083b---12525544078.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe73fc22e2---12254642339.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acd7c641c13---74033784919.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=the+houseguest+amparo+davila+pdf+download
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f071.bin
d7c8ad60c7adff93c7081ac790555fa5b803089c70b0f14327d461cfc17f4ac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF071 5556 bytes

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