Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9b4e0f722c6ecc…

MALICIOUS

PDF

82.8 KB Created: 2021-04-24 13:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5f8db921a788a448ff8fae06e7f09405 SHA-1: e213c7b5f575f5077c0c047f61fbb4c4dba0ca7c SHA-256: 3a9b4e0f722c6eccdcb1018efa90723a49c4537a0cc341706d032ff0fcd06b53
126 Risk Score

Malware Insights

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

The file is a PDF with a high ML classifier score and ClamAV detection, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain that is likely used to host a phishing page or distribute further malware. The PDF structure and embedded content suggest it's designed to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=are+lancets+interchangeable PDF link annotation
    • http://fanisore.sportsontheweb.net/kiss_the_rain_piano_sheet_roblox.pdfIn PDF document text
    • http://jibakerutev.mypressonline.com/55717430116.pdfIn PDF document text
    • https://cdn.sqhk.co/fogizotufijo/dJicnpb/ayo215_bother_you.pdfIn PDF document text
    • http://xenojupu.mywebcommunity.org/23013014955.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/06KjaPd/best_free_photo_editor_app_android_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/ahjMhaL/spiral_fracture_sign_of_abuse.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/jixojafevugofapuxixovefa.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/jhdZN8X/power_equalizer_10-_band_pro_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/ifgdeGO/teledikisowidamitesanerem.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/iJii1ZO/xexitudu.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/beauty_and_the_beast_theme_song_piano_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/laripikiwafo/cibhcgi/gba_emulator_free_download_apkpure.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/velatenutavakevokewesisol.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/juzisiteridazuf.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/fCUjfhc/45910948207.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/ragejufa/nasazisonitivije.pdfIn PDF document text
    • http://samepuwewar.rf.gd/20174263619.pdfIn PDF document text
    • http://vegefozexus.rf.gd/vopas.pdfIn PDF document text
    • http://jedajokojar.epizy.com/30920485455.pdfIn PDF document text
    • http://kotidaw.epizy.com/lightroom_presets_pack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/gedevasuraf.pdfIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/download_essential_hematology_6th_edition.pdfIn PDF document text
    • http://molagegivijoxu.onlinewebshop.net/the_brain_fog_fix_recipes.pdfIn PDF document text
    • http://gasadesa.epizy.com/dependent_and_independent_variable_in_research.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/maremomanefexepuxo.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_off000105d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D3 5192 bytes
SHA-256: 33e33fdb196ed33e31a64bab7509f4d6c75352d6b3f9815d8c1289a265bc4dcc
font_01_sfnt_off00011775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11775 11308 bytes
SHA-256: 3f3edafcd4af9372b35d5e193380f4a8a858aec77fbc8d67921374d3d85c1ac5

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