Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d9ce0c7e67a0b9…

MALICIOUS

PDF

92.4 KB Created: 2021-06-30 01:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ca8a5ed2b3d03fc497ddcc49225b9c5c SHA-1: 1caea971fa845dadcf84a3b7e6fa112675ee2db3 SHA-256: 00d9ce0c7e67a0b9bdb99e4acdba7df70b644609afe25880f444d9b18526e0a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal a link farm pointing to compromised WordPress sites, suggesting the document is designed to redirect users to malicious content. The presence of multiple unknown URLs hosted on compromised CMS uploads further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6620ea925f---zazikefenofator.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/pse0qhspf6rpoe4bq95fr787m4/55770805874.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16078437e66160---13445115167.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/77e572130618ec8792194affcf58862a/65177429627.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aece570363---dizabani.pdf
    • http://diamond6ranch.com/userfiles/file/72282102740.pdf
    • http://strategie-online.net/catalogue_dynamique/file/ditekavuguki.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/bd06a5a17ccab94a4e394c3388472ae3/66019743868.pdf
    • http://tragadsonisurat.com/ckfinder/userfiles/files/piwuripazafige.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a54304b3692---dinigunajazikepuluxa.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bcbdaebb06e---jafadifoboduvefi.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/fe83f7d6d5eb12d153fe687d52f6aff3/jajawadugevamo.pdf
    • https://kristinanamaste.eu/files/jesisibuxiku.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608831a2b3d13---zulavex.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081b80509e7c---26742291302.pdf
    • https://unique-u.biz/images/uploads/file/jekomarinedumuvofima.pdf
    • http://dakmet.pl/upload/zabetifemesi.pdf
    • https://datawire.gr/files/files/20891997672.pdf
    • http://uptownherndon.com/uploads/files/zixinojowomegogumebifusi.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4cc9a1077---rakowipori.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d7e1421ec56---42104908010.pdf
    • http://yaqeen-eg.com/userfiles/file/75641655349.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160982a46a9f58---xerukifunikuz.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/950a1ce04f313f88206ff20139a1fd8e/51396783979.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/j4gjavbkieknla7t28f30gsbgs/sanebejuranujuso.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=classification+of+business+policy+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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105ff.bin
4470354262e696c94f4f7c36e7c9527e3319fe6198dfeb0a1df156d1ee6116bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105FF 10900 bytes
font_01_sfnt_off00011f27.bin
c1ecdb93d90213a0981ffe55dfc95eb4651ccfd3896d1f0b776d84a929f0bc96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F27 17152 bytes
font_02_sfnt_off00014bf0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BF0 16792 bytes

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