Malicious PDF — malware analysis report

Static analysis result for SHA-256 aebdb1c9e5df1e16…

MALICIOUS

PDF

70.2 KB Created: 2021-05-15 23:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9a2238b0137415d229de7e56338880e8 SHA-1: a1ccfd85bec1f2af975ff4b6561d506acd741b32 SHA-256: aebdb1c9e5df1e16b6194cb1b0c401d77207bfe544e9886b12b98e0c3edaae4b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm hosted on disposable domains, designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL 'https://kuzutuzo.ru/strik?utm_term=twilight+series+free+download+in+hindi' is likely part of a phishing or malware distribution scheme, masquerading as a free download lure.

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://kuzutuzo.ru/strik?utm_term=twilight+series+free+download+in+hindi PDF link annotation
    • http://riniwodifole.medianewsonline.com/siemens_breaker_catalog.pdfIn PDF document text
    • http://wedasuf.getenjoyment.net/zunasetad.pdfIn PDF document text
    • http://duwuzoruperiged.scienceontheweb.net/zuzipa.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/3d91ad1d-5ff3-4123-b75a-dfc542e95bff/16567382001.pdfIn PDF document text
    • http://newepizudef.atwebpages.com/kefegolegida.pdfIn PDF document text
    • http://vobozezojip.onlinewebshop.net/bd_full_map.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/2019_acc_guidelines_for_atrial_fibrillation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9970317-71eb-4363-b594-99775e5bb9bd/how_to_use_nesco_coffee_roaster.pdfIn PDF document text
    • http://wemelimefudunej.epizy.com/nopizodiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef0bd5e3-1c13-48ed-8fdf-db1a449e29fa/vesigalevebisofajiv.pdfIn PDF document text
    • http://lekipuvuji.epizy.com/jetifamipogovirop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15a240ad-e04b-40ae-a3c6-4ebc453c7852/john_deere_d140_drive_belt_routing.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/evaluating_variable_expressions_with_exponents_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/venture_capital_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f14c3ffc-15be-440e-b44d-41cbfc52d129/spanish_present_tense_verbs_worksheets.pdfIn PDF document text
    • http://gafelen.epizy.com/vimabafefizedodukibizujel.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD467 5208 bytes
SHA-256: 71064603715c3f0ac4210ee03f4f82a46ba89d3acd22930cc783e8092a23a682
font_01_sfnt_off0000e626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE626 11080 bytes
SHA-256: 5fbbfb6e02eb2f4e5193acf5e223d5889b001c36d1b8313d6826c61885fe564b

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