Malicious PDF — malware analysis report

Static analysis result for SHA-256 84fe298372cf7d4b…

MALICIOUS

PDF

83.3 KB Created: 2021-08-20 19:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 22f27178057e73bcaa71ca0715755265 SHA-1: d6f5646669d3fc8480191c664fd633aa493e5375 SHA-256: 84fe298372cf7d4b1aee0d13472f6093333aef3ac5dcc7173b7c248ce4a4f8de
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, which are likely used to host malicious content or redirect users to phishing pages. The presence of multiple links on disposable or compromised hosting reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608edd564417c---jufojojakev.pdf In PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1a04976ac---gelubomokawukimi.pdfIn PDF document text
    • https://immobiliaresancarlotrieste.it/file/sorizupegabekiluwaziwovok.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/u779nm9k86qpam3uac629oo10g/26889882538.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/fbd3ef3bb4b4498cb5413a592d984346/82353847103.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160899fa458253---543690952.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16099ee232b7df---76557509858.pdfIn PDF document text
    • http://kfbi.ru/content/file/gawevasonol.pdfIn PDF document text
    • https://konzolstudio.ro/uploaded_files/file/45399781391.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/bixatixuwuvolizuli.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/354c6186c55dade05ce8f24dab429116/2316692332.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/sojixoba.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/vaxasomesir.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/zuvadezorovutulejofe.pdfIn PDF document text
    • https://spacio.hk/attachment/file/felomanitebadata.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/96q9im5d1h5rrc30dsdgrrfpdt/93908163785.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/54290691022.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/disisovagijebikajukoz.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d6683c4e7---nirupelazubeloxawujewek.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/d7b715e14aa6a6ca47f954c025dc8401/44311370201.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/4e7d88cd7b304a8930abb36d22df6862/pigutekupib.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/mizunozekisakiled.pdfIn PDF document text
    • https://mollis.rs/files/3209785525.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/39801308292.pdfIn PDF document text
    • https://xigmatek.com/upload/files/89606979922.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=experiment+8+limiting+reactant+lab+reportPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE038 17428 bytes
SHA-256: 4e04a067d67de643438f0af9bc04961637637cf2c2e3ccdab61146b7983d3bcf
font_01_sfnt_off00010de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE7 10984 bytes
SHA-256: 02f41a9cdeb172b3edd5d618d22ff559f7bdbe71815db65008e6228319aa1116
font_02_sfnt_off00012732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12732 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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