Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0094f6b9a11482…

MALICIOUS

PDF

91.0 KB Created: 2021-07-07 21:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15c517eaaf4e2a89b639523218227981 SHA-1: aeadfe496a57bfb2cf3c5842e46111670cd5bb3d SHA-256: ab0094f6b9a11482957f282e54ed8ce251b7655d4db01f18c112f7d5f31c9ce1
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, identified as a link farm. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The primary function appears to be directing users to potentially malicious content hosted on these compromised sites.

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 https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/3fabe82c487e24fa962b8fca8da6c563/74911782618.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160818f169bab5---14723966980.pdf
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c55acad40---bafukekozitexatiwifevo.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609036ccb05b2---52767011126.pdf
    • http://nguyenquangcomputer.com/upload/ck/files/puwapofugajosox.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094a769c1de2---temakirutolirosuwoxeditem.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608134838009f---68302492400.pdf
    • https://sindonis.com/userfiles/file/71224282387.pdf
    • http://chsjackets75.com/clients/a/ae/ae1e0d6431e3080ad3d3eb1024a27f31/File/3420118129.pdf
    • http://suphammamnon.org/uploads/files/59699888030.pdf
    • http://yogo110.com/userfiles/file/manonubuladusesadigotumi.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16089cb370782c---14661738985.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a13ab478d74---luxitof.pdf
    • http://esangsok.com/upfile/files/nesuzefed.pdf
    • http://amphorabeautyclub.com/campannas/file/woretebomizopirejuba.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085696c033b9---50384805186.pdf
    • http://atek-ent.com/upload/file/mubenom.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e5e5dd776---4465148323.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609df4aa155d5---65804405869.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/os91c2ua7r4od61rqakgk06c67/97447783303.pdf
    • https://castilloexterior.net/ckfinder/userfiles/files/wadopebenumobebamirux.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a12bd199b16---6450603669.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/4faj16cqg8884fh41p2p9svflc/76934252126.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/143bd561ac65c42e509542964fc669e1/pelebaropalosilobolimiso.pdf
    • http://autodilykanka.cz/cmsimple/images/file/vapareb.pdf
    • http://pamat.ro/UserFiles/file/95268022526.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=human+cloning+another+you
    • https://medlineplus.gov/cloning.html
    • 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_off00010097.bin
32e8c478ed3b7bdbbfc5d97dc28248b0be8b297bd3d1f4890f86abb73b2a8d73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10097 17272 bytes
font_01_sfnt_off00012e1a.bin
2f26dabd01008298c0d36cb6115044d5e4148869f9b3801ae7a0ad78afef801e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E1A 10712 bytes
font_02_sfnt_off00014677.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14677 16792 bytes

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