Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd66324cb46bbdc4…

MALICIOUS

PDF

82.6 KB Created: 2021-05-19 05:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 90e90cccc5fcd749fbe471087719294e SHA-1: 0654f84b32739013e6880ca7da7a7683559ac65d SHA-256: dd66324cb46bbdc4e01789c0898e3f1ac5c771e02359acb41daa9b88396a9479
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting services and are part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, specifically for phishing or malware distribution. The ML classifier and ClamAV detection further confirm its malicious nature. The presence of a URL with 'logic+pro+cracked+windows' in the query parameter suggests a lure for pirated software users.

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://golowaki.ru/strik?utm_term=logic+pro+cracked+windows PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444353/normal_600c63ea0911b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427104/normal_5fd957f4b7070.pdfIn PDF document text
    • https://mobinefoju.weebly.com/uploads/1/3/1/3/131398425/wuzoja.pdfIn PDF document text
    • https://kefavevanafas.weebly.com/uploads/1/3/4/6/134633526/7724580.pdfIn PDF document text
    • https://zagemixawidi.weebly.com/uploads/1/3/1/3/131378918/segaxibufuz-xomebise-lelenegone.pdfIn PDF document text
    • https://gapojusegora.weebly.com/uploads/1/3/1/4/131408170/9830921.pdfIn PDF document text
    • https://mokenexub.weebly.com/uploads/1/3/4/4/134478104/zojobibufudibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455657/normal_5fe733f35f1e4.pdfIn PDF document text
    • http://sowugadawalu.iblogger.org/prince_caspian_summary_chapter_1.pdfIn PDF document text
    • https://xaforexu.weebly.com/uploads/1/3/0/7/130775472/foweza_vovavid_rirelawijuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485569/normal_60274cbbbe356.pdfIn PDF document text
    • https://detaxotipag.weebly.com/uploads/1/3/4/7/134730838/rodelifupovo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425217/normal_5fcecff40f32e.pdfIn PDF document text
    • https://lawilutimi.weebly.com/uploads/1/3/4/8/134879912/dunafovanuxer_zuluru_dokajorebigitus_vasijutufomole.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/94b91d3e-43eb-4121-9bd7-3749ff32e0ad/31307411507.pdfIn PDF document text
    • http://rexuxos.rf.gd/4304800679.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/919a3a2b-7304-4a8d-9cb7-e2d68e3bd975/lobijalizusibanupitekuk.pdfIn PDF document text
    • http://tananij.rf.gd/descomposicion_de_residuos_organicos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ea4f91-60a9-4a22-bc33-865cca8c1481/31568896687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68abf9af-f4cb-414d-b9f9-2143092c5926/rezosamevutu.pdfIn PDF document text
    • http://rozopujonabesix.epizy.com/jezoluxegakavofezun.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/handwriting_worksheets_year_5_australia.pdfIn PDF document text
    • http://vejimugar.epizy.com/fufegasesipitobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6a557df-093f-40ba-b0fc-1dbf6ac7e712/la_gazzetta_dello_sport_prima_pagina_il_giornalone.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/antiphonal_performance_definition.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_off00010654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10654 5304 bytes
SHA-256: 2af42bc71060c7df07396321ebe65bfb24503f2a97b33cd3d30e46a67e691a3e
font_01_sfnt_off00011894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11894 10756 bytes
SHA-256: 3993c9d27e32304bdeeb56d004f9e38da06784bf649131c515f14fc7b68531cd