Malicious PDF — malware analysis report

Static analysis result for SHA-256 259ffb1d6a443411…

MALICIOUS

PDF

91.3 KB Created: 2021-06-29 07:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 007b6fb969ea0568a88f11a15468ac8f SHA-1: 183ee091534fbc4049dfa1082685329c49bfda48 SHA-256: 259ffb1d6a4434116090130059631854e8e5d675683367991af3a9c335daddae
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress upload directories, indicating a link farm designed to redirect users to potentially malicious content. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. The presence of numerous unknown URLs suggests a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16091d818a3a2b---85167070262.pdf
    • https://hospvetcentral.pt/site/upload/file/25439786913.pdf
    • https://cubic.is/userfiles/file/71570344318.pdf
    • http://polipack.ru/content/file/jujemoz.pdf
    • http://statewideroadservices.com/clients/879378/File/zigalisav.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/510d817f5ec45ba8446b8ae586a62f6a/mowofadesatuk.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad2f625deb---revukafiko.pdf
    • http://www.deopendeur.org/imgUser/file/27021485954.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d8a31939e---bexegu.pdf
    • http://barrybusiness-crm.com/ressource/devis-photo/files/96211699374.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/b55f7f336be0683738f442240db6923b/24939767374.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160824ecf0e983---39733720979.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd992bc0b7---17899678507.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bffd4317e82---sutetu.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/488d861d36dba89365c2d0028a1f775a/gukubuvawazeluxilozewe.pdf
    • http://okfilm.kr/userData/board/file/kimujizegixeviz.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608072a783260---wobuluwejadefelamore.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976ef32d319---22823474105.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/tt48sm85v7dpl820rmbodasoic/zasozozavepaz.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/hu9ci4psoso23fkl5pb8ug2n00/75533584389.pdf
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094699fbd6d2---77666117290.pdf
    • http://niestachow.pl/data/aktualnosci_imgs/file/gopam.pdf
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b55c041aa93---zidewuxekugumetamu.pdf
    • https://alakharia.com/public_html/userfiles/file/78101090000.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f58e4185d---nitobineragit.pdf
    • http://rainbowcaterers.in/userfiles/file/xejelibuko.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=live+gold+silver+prices+comex
    • 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_off0001003f.bin
a847e978be6e2112568445f3993399299e2afec349b154571e139849ca77bd1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1003F 18064 bytes
font_01_sfnt_off00012fb5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB5 16792 bytes
font_02_sfnt_off000147cc.bin
3caec8145cd28d83446a088e9436a9dedbd8998105bdd8541f4311afb3166721		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147CC 10620 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.