Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a405e0e5573cada…

MALICIOUS

PDF

72.5 KB Created: 2021-03-01 03:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 62bdb05b71823fb4049cc40b52206041 SHA-1: d178257ba5deea717ed1ec60ff814bba4ec4765c SHA-256: 1a405e0e5573cada84c87ffa62e6bee71bb9f386d66950888ecb5e6e8ae733a8
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains or potentially malicious hosts. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs suggests an attempt to redirect the user to external, untrusted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/wix?keyword=dispositivo+de+salida PDF link annotation
    • https://cdn.sqhk.co/medujebukoma/YIhigJH/thriftbooks_squared_dallas_tx.pdfIn PDF document text
    • https://cdn.sqhk.co/fematixub/RUifhiD/lego_batman_beyond_gotham_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451542/normal_5ffb3ccdc7979.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/Hgghaji/zombie_zombie_2.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/1ja0tie/48507603853.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/eW07CfH/zaniridawarimerolijokez.pdfIn PDF document text
    • https://cdn.sqhk.co/govazofaj/45ijhgg/diskdigger_photo_recovery_apk_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485309/normal_5fe2481e0c0cf.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/aEiglhe/dark_elf_name_generator_female.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/iahaHhh/nulixotiwoj.pdfIn PDF document text
    • http://zivarejewetuga.22web.org/apple_watch_4_user_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wunikuwikefa.epizy.com/abc_song_music_sheet.pdfIn PDF document text
    • http://raferizowum.epizy.com/how_to_setup_scan_to_computer_on_hp_officejet_4630.pdfIn PDF document text
    • http://nataxos.epizy.com/3054309661.pdfIn PDF document text
    • http://bivoxubi.epizy.com/futile_devices_piano_sheet_music.pdfIn PDF document text
    • http://talagamezibupip.epizy.com/dynamic_ads_facebook_format.pdfIn PDF document text
    • http://puxakuxuvon.epizy.com/define_internal_users_of_accounting_information.pdfIn PDF document text
    • http://wegijadisi.rf.gd/fofebev.pdfIn PDF document text
    • http://perurafofasiw.epizy.com/welunixivuzezukom.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/47425939737.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/assamese_video_songs_free_site.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_off0000de1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1E 4916 bytes
SHA-256: c34674fc4edab5f42326dff7948581e4031272c93d71222785d1dd993c74dee1
font_01_sfnt_off0000eef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF8 11356 bytes
SHA-256: 8569c5410af14e0b980d4d4b68bbb25470e3be6f985a59ddca96f5ef7855ae07

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