Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d100948edd6e791…

MALICIOUS

PDF

79.1 KB Created: 2021-04-14 18:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 900063b63e42c3eab02cb5da89c022b8 SHA-1: 223f26448dc2035fd8b233841cd61ca11dba84e1 SHA-256: 6d100948edd6e7918ed08adfd61de7a77342d1e59f90a50e386f10c8353b9a82
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://vilenefex.ru/strik?utm_term=timex+women%2527s+marathon+50mm+digital+watch PDF link annotation
    • https://baxemajoxololur.weebly.com/uploads/1/3/1/0/131070692/611864ff7.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/ggegjYg/shiny_galarian_zigzagoon_names.pdfIn PDF document text
    • http://grantmedica.ru/silujeramoxzi53x.pdfIn PDF document text
    • http://bexowobiminefi.mywebcommunity.org/forcepoint_category_list.pdfIn PDF document text
    • https://cdn.sqhk.co/sowanigog/bqIibhi/american_craftsman_homes_for_sale_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/berazanoga/gibgihd/ping_pong_ball_and_paddle_holder.pdfIn PDF document text
    • http://instapodarok365.site/71136362342i0cjo.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/Dtibpjc/cats_crash_arena_turbo_stars_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/gc5gfBc/xiliterevurejukef.pdfIn PDF document text
    • http://thrivewebs.com/34728378481w0p3x.pdfIn PDF document text
    • https://mirajaxudedina.weebly.com/uploads/1/3/0/7/130775596/boxati_bamufew.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
    • https://uploads.strikinglycdn.com/files/9d89fee6-c5ca-4dd6-a151-2a297b497a44/62282481220.pdfIn PDF document text
    • https://4d3f6715-1114-433d-a4b7-45a5e22e3858.filesusr.com/ugd/ce86b4_febec40d142045b5bd591077f1cc0a40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d063db-38e4-489d-b7c7-93b340796f25/2004_honda_pilot_owners_manual.pdfIn PDF document text
    • https://f77c8dad-41d7-4a8f-8d8d-c05149a3a236.filesusr.com/ugd/36d413_6e5b3288f81c440392766027fd521282.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/568a3eda-7aaa-47fb-9e9e-10b90a2803a1/fekawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84affbd7-7517-43b1-8513-5f1d32654ad4/hp_envy_4502_printer.pdfIn PDF document text
    • http://kikukuvikato.myartsonline.com/movepiwexefetubigelal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c605fc2-edf1-4590-92bc-0b856e4e6e64/bexutu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD21 5552 bytes
SHA-256: 6c81e85183a3b5704d11242a53e78618aa7fd2ef49252c9f8f0102e850e9d17b
font_01_sfnt_off0000efe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 16860 bytes
SHA-256: a6d451252427cecdbba17536f8732508cbf17545635f8e2841fffe93f760dd67
font_02_sfnt_off000120e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E7 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e