Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c580a1aad3eb633…

MALICIOUS

PDF

91.1 KB Created: 2021-07-04 03:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d44260a0479152c8daea677c9056575 SHA-1: 96bf4bcd16aba91eabdb10e91bf7ce187611ddc1 SHA-256: 2c580a1aad3eb633dcf1d7128e0d0a652a69eb849f270e8ca3f01843c4197391
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other potentially untrusted hosting. The primary purpose appears to be directing users to external malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16080aab468ec5---51784076695.pdf
    • https://cremyco.com/app/webroot/docs/file/32934180052.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9cedd0bd8---nazugid.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160890a975f393---nowafilojawo.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c98fdb33759---jilinejawanazunidakuna.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/aehbll59mq4qlgd07eadvtpmqf/tivizikopumel.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/72a82d6a703e65bbbe19577466182d14/wedogakikagirus.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092238f1712f---87029994458.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160826605b8840---43106947087.pdf
    • http://accessiblevehicleservices.com/userfiles/file/48446761536.pdf
    • http://jnnycc.org/userfiles/file/20040284757.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/1t7s2mgmfhj2h34d9cndp1q9u1/tixitovemilesako.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf4825e6df---boxibogamedoj.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/15a3dd6c95d6d80215b1710e699eba2a/30797099475.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a15b96e9854---saxiwililitovido.pdf
    • https://nguoixunghekiev.vn/userfiles/file/1669702082.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090a695d4c4c---12351144640.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a48c2758d06---virijofejuvixuwegije.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bba2dde2c04---69099055252.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160be768b8b70e---26921386292.pdf
    • http://ezibra.pl/upload//file/72960252189.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/05dd6baebbac780479a6d29cff4d8a5a/rutimetipolebu.pdf
    • http://ip-golubev.ru/ckfinder/userfiles/files/82136797089.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=cute+soulmate+quotes
    • 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_off00010330.bin
780112e9a263e52be004d5f3fe349a459fb577962bcd15354077c7b67e6ae480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10330 17528 bytes
font_01_sfnt_off0001302d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1302D 16792 bytes
font_02_sfnt_off00014844.bin
cb3ed01de90c329be6d3000606fac945be954f97e20be072b3795767d1ade908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14844 10252 bytes

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