Malicious PDF — malware analysis report

Static analysis result for SHA-256 8104ff2de415c758…

MALICIOUS

PDF

77.8 KB Created: 2021-03-22 19:03:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6195431a4d154c3c3999fa5dfea7083e SHA-1: e49beb61124adcb1380080f88b23fecc83f2d2bd SHA-256: 8104ff2de415c758bcc289dee8320f659ee7edefe9cdf25f9ed2a1c4c8bfa882
126 Risk Score

Malware Insights

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

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous links to external sites, including one that appears to be a lure for 'Acronis true image with crack free'. The presence of multiple disposable hosting links and a link farm heuristic suggests a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL analysis point towards a malicious document designed to trick users into downloading potentially harmful software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=acronis+true+image+with+crack+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371272/normal_6037c4c35d92d.pdfIn PDF document text
    • https://cdn.sqhk.co/fazituku/h9gfQjj/highway_to_hell_jojo.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/ejigcoA/megalodon_rc_car_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366987/normal_5ff3d9c3d9b88.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/ahiPSdw/85242278810.pdfIn PDF document text
    • http://wolifote.getenjoyment.net/xisexejazoloxez.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/xabogunebofizatepibifalad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481699/normal_603fb3969adeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365594/normal_600259a75cebd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_60201966c8a39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462341/normal_5fd787431c797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383165/normal_6021a6a3b2b03.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/70667127323.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406782/normal_5ff0a24156981.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/Biamjjb/adobe_premiere_rush_video_editor_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/971cf597-5201-4b4e-be3e-5714773e78f4/programa_de_honores_ala_bandera_20_de_noviembre_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c7c0ae-56f5-4be0-8c66-6a780689482a/refegepigonudugosilibobuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d187fe-ba84-4611-afde-9b4384fa54c3/dovitumuninupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba1d2d72-5a38-4337-89a5-3d5956cc1840/zarokerulogodewulalokut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4b4c39c-e353-4974-b008-44966bf9244c/black_and_decker_mini_fridge_cold_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d36459ac-9d81-499f-8135-710083a7490d/biwewowavufifilida.pdfIn PDF document text
    • http://pekiluji.atwebpages.com/az_500_dumps.pdfIn PDF document text
    • http://mavuriwowul.myartsonline.com/xujavote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93baf7b-23ac-4bc8-8757-cc34fa087c24/the_magic_tree_house_books_author.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda1ece8-6a5f-426f-9fa7-010819f4a24d/my_dungeon_shook.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_off0000f178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF178 5408 bytes
SHA-256: 4348a0abaa5e4b83ed524274797772728c20d3534c7643769d585c6ed0228a06
font_01_sfnt_off000103c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C3 11128 bytes
SHA-256: 216c9c2acb08aaa6dcc8263cf827aeb97252dadde0f58f4addf07ba516e81f37