Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdd6a120c43bac54…

MALICIOUS

PDF

69.0 KB Created: 2021-02-12 15:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4246aafb5ffe59d4352fc7206bab1d94 SHA-1: 385b09d766540bb4652473116b246cdc34402606 SHA-256: bdd6a120c43bac5465dceb6484e9423826a7fc6b96ce6aef9c506c59e04cf6bd
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/123?utm_term=a+continuity+of+parks PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417527/normal_6006d2fa6fe82.pdfIn PDF document text
    • http://rigares.iblogger.org/meaningful_report_card_comments_for_weak_students.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369514/normal_5fef59885df05.pdfIn PDF document text
    • https://mitusifizipera.weebly.com/uploads/1/3/5/3/135300422/6274812.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/ifLy8gg/rolling_sky_mod_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/jonuwezipagi/igfxghf/samurai_vs_zombies_defense.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/mapujov.pdfIn PDF document text
    • http://wrinklestiltskin.com/uno_rules_last_card_draw_fourxzcne.pdfIn PDF document text
    • http://santand-es.com/rcmas_2_subscalesz2kkw.pdfIn PDF document text
    • http://astrology-personal.online/first_world_war_recruitment_posters_for_salelh308.pdfIn PDF document text
    • https://rigugoxa.weebly.com/uploads/1/3/0/7/130776225/foxanazod.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/jeBhiTZ/tebujipej.pdfIn PDF document text
    • https://cdn.sqhk.co/fazituku/jbgeib0/pipilekadekufopezetus.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/lofese/84178213334.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/wanted_bengali_movie_video_songs.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_off0000d2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E3 5132 bytes
SHA-256: df85170945dd20a336a67fc6df0421daa435c30bbbb8be573503a53c4c54d3ab
font_01_sfnt_off0000e480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE480 10288 bytes
SHA-256: a19f02a9354ba979a7b6d786ac128a339a34dfd46443c9c101a0d0ee875ce71d