Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7c79191fff2249…

MALICIOUS

PDF

89.9 KB Created: 2021-07-01 10:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: be0de684fec7138e83cfcdaaba122c17 SHA-1: 74597fe0398fc295b738e734836ea9429178e706 SHA-256: 5e7c79191fff224957502a5458f32249490c07edc80f11dc69a3fc48ecbde136
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, specifically leveraging the 'formcraft' and 'super-forms' plugins for file uploads. The presence of numerous links on disposable hosting suggests an attempt to distribute malicious content or conduct phishing operations. The document body is heavily obfuscated and unreadable, providing no direct clues to its specific purpose beyond the heuristic findings.

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://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070947fa4cba---towupukawegijuxewob.pdf
    • http://ehs1958.org/clients/73155/File/93417447195.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/9c1f50d79ba90712c6256548835e9c38/86001251996.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/0b70662ca0e25ed345e9b66d3a09c3ac/geduwuvuxodepave.pdf
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zawimebu.pdf
    • https://bangvetthuong.com/luutru/files/12342782306.pdf
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b1c1b9f85---zasoden.pdf
    • http://www.specemc.ru/upload/files/melofofu.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089996e104d7---29805700055.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/41hnk0rec17cd9jm11cukglnpd/meniranebejonuguvipegefov.pdf
    • http://volamtuyetthe.com/userfiles/file/5286066129.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/1d0dafa8a0786b04fe4ed3eb214384a5/76051823054.pdf
    • http://princeverma.in/uploads/files/zafozebim.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd5a2bcac45---55315049766.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/783e746e2bda4d93eadc78e9306bd89f/60886369283.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd949dee09a---xiwawobiwudolobakalalalo.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607297675dced---dokiwepalobatepisugukepuz.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/dbe534e04c589873b8fa11666f4748b7/bijowazot.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/3f2cf0715d6fb08022405043cd5ed77d/pefaxetazisimifiruvipis.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/4dee690260f524d332b93abc33a752de/81103782934.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/2n5ug7hlpqha0l990h5fhdtbg2/75928272450.pdf
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/9c37013f298275a3bdf97918f2d07bbc/7314332721.pdf
    • http://hgbs.de/userfiles/file/mezarajazemavenisuxapitu.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/pvmho7h3b39p9ttqao2ekkojeb/kinarijamimokiwifofe.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/235b12d6d4c2a1a4376024fc215f7252/94218750460.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=tablet+compression+machine
    • 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_off0000f912.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF912 16792 bytes
font_01_sfnt_off00011124.bin
867e0c9712e2c85d99ea55a157f51774ce27a5c3725b4128c40cf75f68a7ea82
pdf-font-stream PDF embedded font (sfnt) at offset 0x11124 18528 bytes
font_02_sfnt_off00014208.bin
9243e82bde1d24e4e12fb64070fea1b3c34a28fd014bd20f82a02e6e0eb16e88
pdf-font-stream PDF embedded font (sfnt) at offset 0x14208 10740 bytes