Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f90961d5f499bc…

MALICIOUS

PDF

91.4 KB Created: 2021-08-05 14:37:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d1ef7c28bc433e93e9f1e9d54216d15e SHA-1: bb06902245c9c246cae5b1dcf4aa7fe1747322c4 SHA-256: 32f90961d5f499bc871c9b65698bdbe24fa930d8237426d5ce4281a3e65cfe6c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting, characteristic of a link farm used for phishing or malware distribution. The presence of embedded URLs and the overall structure suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/a06f091ab12bf80f893b5a8bd3cec264/torokadaxozepuxurana.pdf In PDF document text
    • https://veaodaibrahma.com/uploads/image/files/totodoso.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/89800585035.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a80f35254b---gumero.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/17639689434.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/160791bb867b8c---40672169515.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16102d40f9902b---tegabesexerubanegivapew.pdfIn PDF document text
    • https://citronel.com/userfiles/files/fifiwu.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/57990072671.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/nanovatetegose.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773a1d0c55b---72475807774.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/fisulugugexipugilutuma.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/xirapowowokikidasuwufi.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/3829547183.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609859f5d279a---41572668057.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210616_305451ADEC9A29AC.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/301cd27edc544b9f08ae7169c37c5de2/lidejiwulosewifarifode.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/5061917954.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/1719d16a30f834ee05d20ede2c6f9f61/99784346867.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c8e1beeb3---robalemufonobuvonozupilor.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/17935086745.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc758b8682---12727317362.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/sinoxirinamagi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=requisitos+para+casarse+por+el+civil+en+monterreyPDF 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_off0000fe8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8D 18332 bytes
SHA-256: 1253353a41f641badd691d3ba2d1b92b66629eab76cf8f51ce798409623f4116
font_01_sfnt_off00012d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001459b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1459B 11004 bytes
SHA-256: 65692e8f17a83099b37c05235270cf898627321c8d0434d3193ebae9da7d12b0

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