Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c4927878774ae9…

MALICIOUS

PDF

78.4 KB Created: 2021-03-22 05:05:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7139585d03d8f2a2a3296ddafa9766a5 SHA-1: 82e2b2b4ceaca678d09f330528a4bde2b028acda SHA-256: c6c4927878774ae96ad0d4c5b1d7526cd02e814ac414eb26f242dbf264db5244
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains a large number of embedded links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure strongly suggest this document is a phishing lure or a downloader for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/123?utm_term=crime+story+tv+show+episode+guide PDF link annotation
    • http://hayatevesigar.online/hotel_panic_alarm_systemaz9j0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470968/normal_5fd2669c2b79b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416500/normal_5fe2007fb45dc.pdfIn PDF document text
    • http://erse.xyz/50783626245qm74v.pdfIn PDF document text
    • https://cdn.sqhk.co/nozesinipi/aPhjgdq/flying_gorilla_cheesecake_factory_recipe.pdfIn PDF document text
    • http://wodaretibinusad.22web.org/vocabulaire_anglais_franais_arabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458849/normal_60542d967e177.pdfIn PDF document text
    • http://creditscorecard.info/siemens_hydroranger_200_manual_espaol7be02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484812/normal_600ca172cc4c0.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/ic81dYe/mujurolivovopigubanavarax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://naditoliwinudev.epizy.com/edipo_rey_autor_sfocles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa99d76-784b-4369-a253-83020297ce76/how_many_calories_in_one_krispy_kreme_donut_hole.pdfIn PDF document text
    • http://jutibigata.epizy.com/48907958894.pdfIn PDF document text
    • http://jejuton.rf.gd/how_to_program_linear_delta_3_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0280e22-60ed-4140-892f-ceb982d258f2/94788802573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9358c00-8c8f-4a98-a705-4460f96871ad/jusofes.pdfIn PDF document text
    • http://nubijusumodas.rf.gd/which_is_the_best_electric_blanket_to_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a40dbd-34ee-4d4f-857a-ccb96fe6fdcc/pictures_of_gandhi_in_south_africa.pdfIn PDF document text
    • http://nejatunopux.epizy.com/95495565622.pdfIn PDF document text
    • http://kiwaxebaka.rf.gd/airline_sales_executive_interview_questions_and_answers.pdfIn PDF document text
    • http://kikidexawudipox.epizy.com/15830327832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c51c41-f972-4a60-9062-d35ec4c5d2ac/famewatufipitigubulisixe.pdfIn PDF document text
    • http://ropurudowilume.rf.gd/harmonized_system_code_2020.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_off0000f1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A5 5288 bytes
SHA-256: 31a3bb8eaffd2db6712f76be94473dbb7daf912b9cc6626ad935009b73a76225
font_01_sfnt_off00010396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10396 11536 bytes
SHA-256: ae0d3ed22ecedf5dc6b08ec446803e076e697256f7724cebfbc2855eeb1a304e