Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5c3037af559023…

MALICIOUS

PDF

75.6 KB Created: 2021-06-09 09:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 231ef80b79043a6f47479d4af92fbef1 SHA-1: 686eedd3e7121663883745492aa5fb207eb44867 SHA-256: 6c5c3037af559023e3bce779303ab5c577e032fd185ad79cbaf5d98e8050be56
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to 'wastran.ru', suggesting a redirection or download attempt. The PDF structure and the presence of embedded links indicate it's designed to exploit users through deceptive content, likely related to the 'sexy sax man sheet music' lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://wastran.ru/pbw?utm_term=sexy+sax+man+sheet+music PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384154/normal_60674316afe4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484376/normal_5fde6611de54a.pdfIn PDF document text
    • https://sivubatololux.weebly.com/uploads/1/3/4/8/134850937/zakipa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390664/normal_5fc8859776cfa.pdfIn PDF document text
    • https://wetokusoxuzufo.weebly.com/uploads/1/3/4/5/134508242/pinakunake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5fe9e2f6f3bf1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vibasuvezuz.pbworks.com/f/ias_ancient_history_notes_in_hindi.pdfIn PDF document text
    • http://sepaxebi.pbworks.com/w/file/fetch/144923625/nsmb_wii_iso.pdfIn PDF document text
    • http://mazibudikor.pbworks.com/f/free_printable_music_worksheets_for_preschoolers.pdfIn PDF document text
    • http://pozapagula.pbworks.com/w/file/fetch/144781815/raft_survival_multiplayer_2_3d_mod_apk.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144462438/equation_differentielle_ordre_1_variable_separable.pdfIn PDF document text
    • http://gijorugisaw.pbworks.com/f/how_to_download_my_village_voter_list.pdfIn PDF document text
    • http://jolamibo.pbworks.com/f/36429368029.pdfIn PDF document text
    • http://xelivolofuso.pbworks.com/f/english_to_urdu_spoken_books_free_download.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/sopa_de_letras_de_sinnimos_y_antnimos_resueltos.pdfIn PDF document text
    • http://zufiwuz.pbworks.com/f/58686298553.pdfIn PDF document text
    • http://gopamux.pbworks.com/f/miwodixegirori.pdfIn PDF document text
    • http://fuxotatizexu.pbworks.com/w/file/fetch/144573255/maxasijedukixise.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/w/file/fetch/144423378/fovujuzuxasajifumeme.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144618021/vasabodilub.pdfIn PDF document text
    • http://pebegijopolo.pbworks.com/f/download_android_apps_on_pc_without_emulator.pdfIn PDF document text
    • http://luwivaj.pbworks.com/w/file/fetch/144498606/how_do_you_turn_off_active_now_on_facebook_messenger.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_off0000eca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA4 5184 bytes
SHA-256: 485a4332af94afb6794f9f1bc56ce321de81e2fcdbbeb0069f4596f78050cba5
font_01_sfnt_off0000fe2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2F 10308 bytes
SHA-256: 75433e476ae3e6ba752313170ba59f7f5eec38d5feedc753da1f5efc23d24dcd

Open this report in the interactive analyzer, or submit your own file for analysis.