Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2f7fc49db2d3b5…

MALICIOUS

PDF

71.6 KB Created: 2021-02-02 12:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c5cd54044b1e3fe02fda7cd8d2311ba7 SHA-1: c66c0745afcb34388a3c02ecc1954c630db602f1 SHA-256: 0d2f7fc49db2d3b5c809461f0b1da939c6ac488cf39c75c696839b0a5f6de21b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm by heuristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While 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 0.9998

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://seumenha.ru/aws?utm_term=analogy+examples+for+competitive+exams+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369318/normal_6013b359e1243.pdfIn PDF document text
    • http://boomua.site/vunasejanezulovuzy12v.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/fowitizajaguv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501206/normal_5fd1003fce717.pdfIn PDF document text
    • http://sait-ok.ru/i_spy_worksheetskz3vy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449397/normal_5fee34e020384.pdfIn PDF document text
    • http://instapriz24.site/37027449805m6nmy.pdfIn PDF document text
    • https://xuduwenonotowud.weebly.com/uploads/1/3/1/3/131379268/ravunemupado.pdfIn PDF document text
    • https://bezatawe.weebly.com/uploads/1/3/0/9/130968967/bujoxaju_veneboxo.pdfIn PDF document text
    • http://uablog.website/imposters_handbook_2f6znz.pdfIn PDF document text
    • http://azorocheat1.xyz/baby_browning_magazine0ewts.pdfIn PDF document text
    • https://pazunorafozide.weebly.com/uploads/1/3/0/7/130776571/vukefat-kulab-musosu-xuzakuto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383687/normal_5fcab44248eed.pdfIn PDF document text
    • https://namosozevo.weebly.com/uploads/1/3/0/9/130969937/turavaropiw-jabakab.pdfIn PDF document text
    • http://fsfsfd.xyz/new_years_resolution_quizklnuc.pdfIn PDF document text
    • http://itasda.online/cafe_privilege_cafetiere_offertexzq8s.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/minaxigevani/bawofixugasolasemoduxi.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/65851419663.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/patopusala.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/cteph_guidelines_2019.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_off0000dac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC0 5692 bytes
SHA-256: 347033873afa5ee8b3385018e472d70ea6dd0ec9065470eb4d9557bbf98f3237
font_01_sfnt_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 10256 bytes
SHA-256: cc912dd0fe4f165766ffe783d84882539e13c3a0a336a8ca6b7a56e79527a345

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