Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cb54a83ee2184e7…

MALICIOUS

PDF

80.4 KB Created: 2021-04-07 00:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 35592cc7ac01ab6db2496f0d94d55bc6 SHA-1: 3ecc55115232f259a40e6226b8184a988583cda4 SHA-256: 2cb54a83ee2184e7b0f592adc95b4cc5a134f3ee936ddf86382739c5ab810d81
134 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including one on a disposable hosting domain, suggests a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to games and downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://kuzutuzo.ru/award?keyword=tongue+twister+game+pdf PDF link annotation
    • https://meverelalopabij.weebly.com/uploads/1/3/4/1/134108836/3935223.pdfIn PDF document text
    • https://fikuvigobe.weebly.com/uploads/1/3/4/5/134582673/gafuneleripiw.pdfIn PDF document text
    • https://rupusuji.weebly.com/uploads/1/3/4/8/134878943/fakegumujadi-kibigoxojabogo.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/f9hcuHK/the_off_road_shop_lewiston.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/bmieggN/conspiracy_2001_full_movie.pdfIn PDF document text
    • https://fatanavaxiwakat.weebly.com/uploads/1/3/4/6/134606547/c27f2151d1d407.pdfIn PDF document text
    • https://cdn.sqhk.co/supekolev/el0f5md/wwe_champions_2020_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/vasavubedo/eKojjRN/88434790840.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/barreras_de_la_comunicacion_en_enfermeria.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/6ac3fcf4-35d2-4f46-a9fd-81597b4913fc/ashton_hagans_season_stats.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/milurawozuzugipofimugot.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/rakidumuriganoluneferux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23d8a899-f55c-4de9-8be6-36d65aa6f886/what_does_a_head_of_client_services_do.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/god_of_war_game_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47f38426-9e36-4309-948c-0f5cd5b049d4/nupobodugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f95c6279-d513-4515-9bbe-1c4cdb8c6b3e/magic_tree_house_books_how_many_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/75691736660.pdfIn PDF document text
    • http://xutenasejubibe.atwebpages.com/hard_anodizing_process.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/borimavaledebad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34bcbf46-cfbb-4f3f-9a97-9a63b85bfbe3/kagekuzizeziposokivuvir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/304c331b-d35d-4469-b3a4-023a2d4f0ee8/christian_praise_and_worship_songs_2018.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_off0000fd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD19 5368 bytes
SHA-256: 164d9aeacb6fa1cb234a6b50c456c32cc147036e04d0303d1605fce2544ac9e7
font_01_sfnt_off00010f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5D 10820 bytes
SHA-256: 2d959bcb0813cb9c6d743976e391fc4b77c8df360ff1b1468e543e97d223adc6

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