Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fad299e6d1ba4a5…

MALICIOUS

PDF

70.9 KB Created: 2021-02-21 14:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4b4cb7a06045b1c36c5d01639dfa9697 SHA-1: 9e487b1bf68a43a820c60f798315ed42c7683ebc SHA-256: 1fad299e6d1ba4a5fd9aecf23bd139a49a7b131ea8b7825f0b01ced4e7df3c5d
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file exhibits characteristics of a link farm, hosting numerous external links to other PDF documents, likely as a method to distribute malicious content or engage in SEO manipulation for phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/strik?utm_term=english+book+pdf+download+class+8 PDF link annotation
    • https://cdn.sqhk.co/rubuxupab/8xiMtWO/sonic_the_hedgehog_movie_supersonic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420238/normal_600416de48c2b.pdfIn PDF document text
    • https://cdn.sqhk.co/sapugelezuf/e1if083/90277196852.pdfIn PDF document text
    • https://cdn.sqhk.co/zojoguxuban/Z8iaTGN/burger_king_breakfast_menu_times_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/bowewulaxam/Ejj0icp/russian_car_driver_zil_130_controls.pdfIn PDF document text
    • https://dazuzidasepod.weebly.com/uploads/1/3/2/6/132681566/kolosawigavewunojit.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/hiAqUjg/fivanukumagazefesid.pdfIn PDF document text
    • https://mexukisigugat.weebly.com/uploads/1/3/4/7/134702857/kazof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366324/normal_60066ae052c33.pdfIn PDF document text
    • http://aduo5.online/angular_template_form_validation_examplewvbza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384150/normal_5ffbffa7c2c45.pdfIn PDF document text
    • https://tesevazaxuj.weebly.com/uploads/1/3/4/4/134476418/9346be29e53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483103/normal_6000b228b1272.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/xamisawut_vubipipaj_zemipukemafore.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/rasegemujaxexadukak.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/rusavalojapir.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/nosigimeferutegib.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/responsive_bootstrap_carousel_free.pdfIn PDF document text
    • http://tujufevowupise.epizy.com/average_grade_point_average_australia.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EC 5768 bytes
SHA-256: 01ea5b6a257d425675dfbfc6c39c8df9b55941c2ed2fa10e20c7a50e7b863632
font_01_sfnt_off0000e9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AB 10756 bytes
SHA-256: a4ea1802be83ff318f8227a01657a0db112ee0aacc50cba40a02173ff8643827

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