Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3a8c0d7e60705d…

MALICIOUS

PDF

73.8 KB Created: 2021-03-19 18:33:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a74ec8c9388b53339287cf1c5ab16f81 SHA-1: d588b17607492773c39512edb612b66f467c5bf2 SHA-256: 2a3a8c0d7e60705d3b69b67d17c37626045c79a101fc9bde4dbe745c1feb6862
126 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a link farm on disposable hosting, with a high ML score and ClamAV detection for Pdf.Phishing.Trojan. The embedded URL points to a suspicious domain, likely serving as a lure for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://midufefew.ru/strik?utm_term=el+mundo+magico+de+terabithia+2+pelicula+completa+en+espa%25C3%25B1ol PDF link annotation
    • http://bibunom.iblogger.org/once_a_runner.pdfIn PDF document text
    • http://nunopasatipimav.medianewsonline.com/fundamental_laws_of_electrical_engineering.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/idR4ihV/formula_sports_car_racing_impossible_tracks_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/palezubifo/jZ4geqb/cover_orange_2_level_10-_20.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikagisato/heib3gh/namazu_beast_tribe_quests_ffxiv.pdfIn PDF document text
    • https://cdn.sqhk.co/lirerafi/r29dAgc/mukijadikanuni.pdfIn PDF document text
    • http://zepofevof.22web.org/juzejosegibejivewotebufaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rukawinasi.rf.gd/woxojekosivemora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65876aad-5660-4f7a-be7d-2d99dcb37471/muvutatubunelizepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19c3cedb-1fe3-45ce-8d69-63850bbfd8cc/winin.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/what_is_the_best_genre_of_music_to_study_to.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/37201471930.pdfIn PDF document text
    • http://numorajigot.epizy.com/timetitukediveti.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/23468099457.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/46410906323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daa155db-db6d-4284-b125-80416157c6ba/basununusexaj.pdfIn PDF document text
    • http://zevusup.atwebpages.com/pojezibupux.pdfIn PDF document text
    • http://naxefugoxodikow.atwebpages.com/62940996249.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/how_to_take_apart_kenmore_70_series_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20019d73-0a63-4d83-8674-444fa23b0336/what_does_a_pitbull_great_dane_mix_look_like.pdfIn PDF document text
    • http://kufalogomisag.epizy.com/cowboy_bebop_rush_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/goebbels_diaries_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbff8bb6-9a3e-4560-9064-d420994e8022/beretta_m9a1_shoulder_holster.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_off0000dc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC08 5928 bytes
SHA-256: 41ac60d99959a5c0e2b519e69a898b8413b655f49799da977b13a1003b14d906
font_01_sfnt_off0000efc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC6 12956 bytes
SHA-256: 8b9cf1d2e6bf948b52ac2ad6cd7ac07962488b35e3aa815c825c8fe843098e6a

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