Malicious PDF — malware analysis report

Static analysis result for SHA-256 4023c9c7a625953b…

MALICIOUS

PDF

94.1 KB Created: 2021-03-08 23:03:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 79ebdf1ac604d658615f1ac21c6823cf SHA-1: a4b8e875667fecf4fe14b3045041ff53c72548f0 SHA-256: 4023c9c7a625953b69e599bc119cf97f92ad59e324b0a336ee3d4c1a2465bea6
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 for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The PDF contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of numerous external URIs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/strik?utm_term=test+english+file+beginner+pdf PDF link annotation
    • http://pebunoguge.mygamesonline.org/15264813461.pdfIn PDF document text
    • http://gukabibus.mygamesonline.org/vudotekul.pdfIn PDF document text
    • http://jogebavipe.iblogger.org/vezefazixewen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417418/normal_6021bd033e318.pdfIn PDF document text
    • http://janurikemodowu.iblogger.org/47251504214.pdfIn PDF document text
    • http://guwilos.iblogger.org/explain_latter_and_former.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445745/normal_603cc895d7e7b.pdfIn PDF document text
    • http://tijudiwulewanuw.getenjoyment.net/zadinerimujepok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_60110fdc5cc3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465131/normal_5fda3dd7d652e.pdfIn PDF document text
    • http://pifemukopisare.sportsontheweb.net/pajutukepese.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/steins_gate_0_route_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473645/normal_5fdbc3e0323d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/radawevexinak.pdfIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/68899696388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67aa1e51-a2f0-47b6-8b48-5e31d4b25c36/wazotemufozetisamobuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34ad209d-535c-43c1-97f7-af68e52f938f/craftsman_garage_door_opener_repair_near_me.pdfIn PDF document text
    • http://xumugipetoje.epizy.com/rumomotiwe.pdfIn PDF document text
    • http://bigofuzov.epizy.com/nugisefux.pdfIn PDF document text
    • http://bewaxupu.rf.gd/3305368387.pdfIn PDF document text
    • http://puwagof.rf.gd/zogalo.pdfIn PDF document text
    • http://vajexakatozezal.epizy.com/98901456113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e1543f5-ceb7-497c-89d4-1f3dd7b6217b/93829165058.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_off000120f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F2 4240 bytes
SHA-256: b235a10da89b405c1276536038ae1b2e7aafc3baad5e11a172bf1b481156a9a6
font_01_sfnt_off00013004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13004 5180 bytes
SHA-256: dcbc5f824b6c28adcde7395821faf3c92b21002069b03c6ad358b8fe1d3769a1
font_02_sfnt_off00014197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14197 13312 bytes
SHA-256: b575d5d5cb7a7567caf2c7e89f56cf6a02063fc026cc67b5f13b42757bbe716e

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