Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe428f9c3a5d11bb…

MALICIOUS

PDF

77.5 KB Created: 2021-04-28 00:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 548c7df54a0cbf69741009646fc24c45 SHA-1: d36868d8783e8bf7e1595a5ee3ec5158e219c606 SHA-256: fe428f9c3a5d11bb66f8237e641ea43a7632374bb103ce789122acb7142715af
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to iPhone call issues, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/strik?utm_term=why+is+my+iphone+not+ringing+when+i+receive+calls PDF link annotation
    • http://ponaxamewimenul.sportsontheweb.net/antifungal_agents_definition.pdfIn PDF document text
    • http://wisatemubudu.medianewsonline.com/bharat_acharya_microcontroller_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483103/normal_6049240bdece0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413575/normal_60210c821e125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_603a4085c89d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477623/normal_603978d3bbfdf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402478/normal_5fe000445fd8f.pdfIn PDF document text
    • http://suvuxivenorum.mypressonline.com/fagujuzudiwilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374535/normal_5fdc47d6ef12d.pdfIn PDF document text
    • http://xufopizaxeto.medianewsonline.com/beethoven_virus_ost.pdfIn PDF document text
    • http://wugupomovupa.sportsontheweb.net/xexasozavisawokizofizuva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503787/normal_604a8aca7b7c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465398/normal_5fff7d7bcf185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392664/normal_5fdb993bdeeb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497646/normal_5fd60dd1e9270.pdfIn PDF document text
    • http://xolokeminapi.getenjoyment.net/acuerdo_de_basilea_1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vidilig.onlinewebshop.net/58475224152.pdfIn PDF document text
    • http://pedamodaw.onlinewebshop.net/48705252708.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/video_er_from_any_site_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/reacciones_quimicas_de_neutralizacion_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/cognos_10._2_report_studio_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/bionic_commando_rearmed.pdfIn PDF document text
    • http://jumawivowibeb.onlinewebshop.net/sales_operations_manager_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/retezizidogalasejosiz.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/51326764685.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_off0000f0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B3 5616 bytes
SHA-256: a69547b21e2ab4a8c72e611656ec91b8c296b89a20f77d0d35b727bbdca9bae8
font_01_sfnt_off000103c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C9 10768 bytes
SHA-256: aa29d02e9e68382bf1db68148c54023d1b0f39c491190e72b9393238186d9d9b

Open this report in the interactive analyzer, or submit your own file for analysis.