Malicious PDF — malware analysis report

Static analysis result for SHA-256 22bb8e88d0629382…

MALICIOUS

PDF

90.9 KB Created: 2021-04-01 01:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 9b2eb361f6fa6af9bdf1095bbbfc24c2 SHA-1: 2b1d2dcc9a9120e61c606280969b05b0e161789d SHA-256: 22bb8e88d0629382483fe702d2dc565891976567243529c9ecd9938dca6fc1f0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are flagged as link farms or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://bologen.ru/strik?utm_term=ninjutsu+moves+for+beginners PDF link annotation
    • http://firstdoctor.xyz/formula_de_viscosidad_dinamicavrlbg.pdfIn PDF document text
    • http://nadefememidep.medianewsonline.com/twitches_book_1.pdfIn PDF document text
    • http://beautysale.site/sisazevutikimakipu54t5l.pdfIn PDF document text
    • http://vutanari.22web.org/bimegojulukabatuvu.pdfIn PDF document text
    • http://topcreditreport.info/nursing_prioritization_delegation_and_assignment2ddu9.pdfIn PDF document text
    • https://cdn.sqhk.co/fejezolixo/jgjji6h/bevisepob.pdfIn PDF document text
    • https://bojumojomugo.weebly.com/uploads/1/3/4/8/134850871/najudufadoxe_firosupan_mulufizavefufo_sabinu.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/1F5Qiat/neon_motocross_games_for_ps4.pdfIn PDF document text
    • https://dakewamegiru.weebly.com/uploads/1/3/5/3/135305658/9200b5.pdfIn PDF document text
    • http://sandwichhq.club/gobosugeropilutuperifife9cr6x.pdfIn PDF document text
    • http://duwuzoruperiged.scienceontheweb.net/15719440302.pdfIn PDF document text
    • https://cdn.sqhk.co/pisapaxosabo/hdAyjjP/world_history_2_unit_1_quizlet.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/pjbAibW/twisted_tea_price_6_pack.pdfIn PDF document text
    • http://arthromedro.xyz/dragon_ball_z_free_episodes_downloadrjqvh.pdfIn PDF document text
    • http://ramuwesitavoz.mywebcommunity.org/72936803999.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mogozuru.rf.gd/the_ultimate_crystal_healing_guide.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/15554318198.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/44084231077.pdfIn PDF document text
    • http://kelirifexobuw.rf.gd/48892117110.pdfIn PDF document text
    • http://miruwofewap.rf.gd/divinity_original_sin_knight_build_reddit.pdfIn PDF document text
    • http://nujebij.onlinewebshop.net/fojesodawugi.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/auditor_general_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/27787866600.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/bora_stankovic_necista_krv.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B98 3520 bytes
SHA-256: 1fcb4cbc78b057b04206bc6d9cca48852adf8277b7aa8e2368c881ee222e26df
font_01_sfnt_off00011814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11814 4972 bytes
SHA-256: f491630b1f486c7149922960d752317cc116a76679da2d7a238843bcb252fe0f
font_02_sfnt_off000128f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F9 10904 bytes
SHA-256: 65b454aff95669c49630f6ff0a1bb964ae33ac9944a66ba9be8b2e4246cc4a33
font_03_sfnt_off00014df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DF2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3