Malicious PDF — malware analysis report

Static analysis result for SHA-256 563541249f599010…

MALICIOUS

PDF

90.2 KB Created: 2021-06-26 13:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d56607e5c006d1b3169280f590c6a66c SHA-1: fafe35bc8608449cc7bb0c84c59405cc4c3e51e7 SHA-256: 563541249f599010779bf29e53a61b0a8294a19b38c7a80481d7da68a6f71792
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. These links likely serve to manipulate search engine results or redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/ffa1e21f21d31cfe765e66755966d6e7/xabakeniwa.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/o9a1k857e012ju94o1jrhvdg74/62136422240.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/8f4ba0c6134eca42395c288d3148c81f/98780023229.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2490e2c16---59964017548.pdf
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1eb95919e---bamekunufa.pdf
    • http://diversecityuk.com/userfiles/file/butixu.pdf
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/f439857e5809e2eff42174322c1c1f10/61913943420.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1608710e339a47---regisebonodakezutef.pdf
    • https://sasalidayanisma.org/uploads/file/51334781293.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/8c5dda6951b07f72ffa3194391230916/sipakuzutuduvonunitexut.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/ji7itk2fmjuu0b9ffot79fs4na/dujuxaxexuzogas.pdf
    • https://hoalavender.net/upload/files/folojow.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073c2dcec887---lenogobaluximu.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/f119a456039dfb2f6cea523f40bab951/xuvurajinumazivemitiwed.pdf
    • http://sitoad.com/bbqjoekey/files/202106110442121226.pdf
    • http://gotween.com/userfiles/file///66397467322.pdf
    • https://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/k3rok23gati6unpmrld8n94k61/debewovofalevipeleb.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/42ac7021564e46f1a6c2fe6b1c4366bd/75356093535.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/r677humv7im0mdnne0dvc4bhnm/68979476708.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c47a37ac1c4---volarujenevajaninupagu.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077e1bca2fab---50770665309.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c952fdec0d9---gedodulewoges.pdf
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/c0161ac36816830f86fda2e99109bced/gedebar.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5e80c956c---dojevipexem.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=nonton+film+after+we+collided+sub+indo+full+movie
    • 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_off0000fca9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA9 16792 bytes
font_01_sfnt_off000114bb.bin
47d45fa1af7fd323a119cf43ff303dca2851cb9bdb84e54ef3d55c5020e438e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114BB 17252 bytes
font_02_sfnt_off000141a5.bin
c8448bfe09dd09515d1ed9121321883bcaedb4226f13a785d1f440a476144a8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141A5 11008 bytes

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