Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69d15eb9ada2163…

MALICIOUS

PDF

85.8 KB Created: 2021-03-12 15:01:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9957bb2edde88f41847bea53baab30ab SHA-1: a67217cd518e1f3353268908c007dc5fd523925f SHA-256: b69d15eb9ada21631001a6c947ae015f9cf7d3e37f565c846ab44123a21b4eb3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit vulnerabilities or redirect users to malicious sites, aligning with spearphishing attachment and client execution techniques.

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://dugedepap.ru/award?keyword=load+test+on+dc+shunt+motor+pdf PDF link annotation
    • http://paxenazubenib.mygamesonline.org/comcast_xfinity_home_security_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420765/normal_600e7af20c14f.pdfIn PDF document text
    • http://lagujegivupani.22web.org/break_even_analysis_mcq_questions_and_answers.pdfIn PDF document text
    • http://suwufexez.sportsontheweb.net/what_the_purpose_of_a_mortgage_deed_look_like.pdfIn PDF document text
    • http://bepelus.iblogger.org/gudaraxuzusoxuf.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamozomeb/pHhiji4/ants_go_marching_song_chords.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422918/normal_5ffc7fc75e37b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483837/normal_5fc5c9127a4f0.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/3Pji40a/prank_call_hello_neighbor.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/5ibq4gf/set_ringtone_galaxy_a20.pdfIn PDF document text
    • https://cdn.sqhk.co/maxevurux/lnjgHjb/darkness_rises_cheats_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/WMgcPAQ/khan_academy_sat_practice_reading_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eba2953-4d72-4d99-8117-a366d9f17461/where_to_buy_parts_for_champion_generators.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e36881b-c7ae-4d9c-9862-6f64cf5a44e3/sitidexaduxobejazilotuxil.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/tableau_product_key_cost.pdfIn PDF document text
    • http://nikavavufuxirel.epizy.com/all_network_app.pdfIn PDF document text
    • http://tulifal.onlinewebshop.net/how_do_i_reset_my_smartband.pdfIn PDF document text
    • http://zotubune.myartsonline.com/a_midsummer_nights_dream_summary_act_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e18f86f4-b41f-484d-b633-3cfd0d6432ed/frigidaire_mini_retro_beverage_fridge_pink_efmis129.pdfIn PDF document text
    • http://vudazirukileri.epizy.com/c_template_instantiation_vs_specialization.pdfIn PDF document text
    • http://gemovimuwopete.atwebpages.com/towekuweza.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_off00010c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C51 5304 bytes
SHA-256: c78603eacf209ad8bde0d91d7d16297f42a0374613382f573d019e4dabf728f6
font_01_sfnt_off00011e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2F 14008 bytes
SHA-256: 8bf6b99a8cd7a3b261c5678db53949f7f7776149103b2effaeecae6895d8706e

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