Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a2dac082414d91…

MALICIOUS

PDF

105.9 KB Created: 2021-08-12 18:42:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f74f34be11b6639f6d5bbd39086daf4d SHA-1: 600d252a395b7fccce1b5cb9dd3eac9024b31222 SHA-256: a3a2dac082414d91165563c5ffed4e3f53da28ca4caa28c8e2ea501d3d1bb3ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress upload storage and disposable hosting, indicative of a link farm designed to distribute malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://bnovum.hu/downloads/46136207151.pdf In PDF document text
    • http://daydala.com/userfiles/file/zoderekexeluj.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/91179118524.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c7778768a08---zuzezederogekofa.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/66981f16c6cdebce53f5548363a52628/49193311659.pdfIn PDF document text
    • http://collegedelunion.com/clients/76066/File/muvejise.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/31373090643.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/63920727999.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a0e4441a6c7---41523759003.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbb23ecd50---4005129472.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/nirapo.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9fe515969---fofuvewi.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/59926154032.pdfIn PDF document text
    • https://belloverde.net/emailer/file/25085369879.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abb49625bf2---fogepatelutoxubipomugu.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/2f5d5a8fa5592c1ec5b02740f141df85/kinad.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/mikazadafelobos.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/3eabe23cd16a6a73084aa171897ecd71/92124693897.pdfIn PDF document text
    • https://www.ideaklinik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b42e588bf---56697288361.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/gaxomewogixesag.pdfIn PDF document text
    • http://homelife-superstars.com/image/files/venakilasolinekisiw.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/lohme8di05dm36cro88o0l1fl0/vufudoduniv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=download+rockstar+full+movie+720p+bluray+watch+onlinePDF 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_off0001345f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345F 11776 bytes
SHA-256: 82453e38b6f38c190e6a3fff918d50e6c6696a5db7b179241dd712767fe65ab1
font_01_sfnt_off00015041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15041 18956 bytes
SHA-256: b2766e3497e0dec0fe06de22d3dc63bc5f2a70a8bd7c036bb4cff6abefe6cec1
font_02_sfnt_off00018032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18032 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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