Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bdd8af25e8a8a9b…

MALICIOUS

PDF

78.1 KB Created: 2021-03-09 21:18:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b8fcc1fad3cdbd8f4e78f2d34139d081 SHA-1: ddafa6ef6dddfab80b11759c1a0c28d3d3804e3d SHA-256: 7bdd8af25e8a8a9b0f86d5db4773602ff046bba1a91e38c7f5c96bbc285813d6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL pointing to a suspicious domain that is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/strik?utm_term=how+to+study+for+permit+test+ga PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473375/normal_5fe816e491256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501989/normal_60197426ac7ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425908/normal_603f3a18af6ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490369/normal_5ff4ef148d74b.pdfIn PDF document text
    • http://vasamekekegu.iblogger.org/lugununokeraliwovili.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_600c5e1052646.pdfIn PDF document text
    • http://lixanijet.iblogger.org/singer_handy_stitch_manual_instrucciones.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5fd044b69eb80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_6016f3d3a0096.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375093/normal_60034515becb8.pdfIn PDF document text
    • http://vanesifonemume.22web.org/geguvowalamu.pdfIn PDF document text
    • http://wirodapupoz.iblogger.org/migasitagoxowenabudurufu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mafonoxerinomif.epizy.com/garona_halforcen_follower_guide.pdfIn PDF document text
    • http://magepuvobajibi.epizy.com/matixapiriniwolu.pdfIn PDF document text
    • http://luviwozota.rf.gd/genting_singapore_annual_report_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/broken_sword_walkthrough.pdfIn PDF document text
    • http://judilawazawu.epizy.com/xobujelewu.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/69863135382.pdfIn PDF document text
    • http://wejonixegovut.rf.gd/wordly_wise_3000_book_6_lesson_12.pdfIn PDF document text
    • http://peforuk.rf.gd/demifuvunoreka.pdfIn PDF document text
    • http://rozopujonabesix.epizy.com/196905513.pdfIn PDF document text
    • http://zenomidesedi.rf.gd/how_to_stay_sexually_active_after_50.pdfIn PDF document text
    • http://rowezezivifa.epizy.com/13805437999.pdfIn PDF document text
    • http://sagapuxoxonigig.epizy.com/administracion_de_medicamentos_pediatria.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_off0000f212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF212 5484 bytes
SHA-256: 3215134e061d96ca283c816a1f2264880498a30657e734b668db8f4f1a50fa94
font_01_sfnt_off000104bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BB 11884 bytes
SHA-256: 310c7371a0945281dd642d614f53c9fd67970bdeb0af8ed9b542db3884461309

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