Malicious PDF — malware analysis report

Static analysis result for SHA-256 c569d97cc09f93f3…

MALICIOUS

PDF

99.4 KB Created: 2021-03-10 06:23:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a532424751cb153dea38693232a4089e SHA-1: f1fca83da31acbe1d029c7b390c92b9e9dedd019 SHA-256: c569d97cc09f93f3614f49b8c57bef4a84a11b97ad7b23590073ec57addec4ab
206 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The presence of a callback lure heuristic indicates it may be attempting to trick users into calling a fraudulent support number. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mezovuduw.ru/strik?utm_term=the+shining+remake+2020+trailer PDF link annotation
    • https://varepanuror.weebly.com/uploads/1/3/5/3/135394497/44eee.pdfIn PDF document text
    • http://tujijamutibe.sportsontheweb.net/map_of_the_world_quiz.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/yard_machine_3.5_hp_edger_oil_change.pdfIn PDF document text
    • https://wafulezejo.weebly.com/uploads/1/3/4/7/134748518/29a72c4ebe08.pdfIn PDF document text
    • http://vipodesin.22web.org/what_is_a_webelos_scout.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/86231087412.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/30382298447.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/zibenoroduzuw/android_notification_codelab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2db3ed9e-8897-45eb-84d5-2bcff3229467/word_building_exercises_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/kekafobokukazexo.pdfIn PDF document text
    • http://xelidamos.epizy.com/depuy_synthes_annual_report_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a11ae5-d730-4ad4-b696-61ecec054594/hp_officejet_pro_8500_wireless_ink_cartridges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bd80878-06be-4d66-9b05-820c7282bfb1/karijatevuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf2226f7-7072-40e5-a62a-d3b19afd5bdb/convict_conditioning_push_up_step_1.pdfIn PDF document text
    • http://dupofax.rf.gd/swtor_onslaught_patch_size.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/crossword_answer_for_heraldic_emblem.pdfIn PDF document text
    • http://pufigopinenise.epizy.com/vejiga_neurogenica_tratamiento.pdfIn PDF document text
    • http://luparev.epizy.com/test_for_reducing_sugar.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/xatetelowovitew.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/free_printable_hymns_sheet_music.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_off000144e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144E4 5388 bytes
SHA-256: d3842b3a671bc677505ca8826067a75543ba21a57a378f29444555e4f89540a5
font_01_sfnt_off00015703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15703 12156 bytes
SHA-256: 505235fa8617fdf704e0e02e9e513af26f9b3f2db8f8c39be12e6bfded092430