Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb2f3fd584e4908d…

MALICIOUS

PDF

74.6 KB Created: 2021-04-07 17:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 28d7b6c0ddd9a677915cd76611e0debb SHA-1: 262e9ebc7f5b0975507647384b670d09b5fd2a9f SHA-256: cb2f3fd584e4908d83c219f33b927c35a639e6782af4719a5a3eb95a606b6ae2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or redirectors, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure strongly suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign or to deliver further malware.

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://druttle.ru/strik?utm_term=kitchenaid+superba+dishwasher+owners+manual PDF link annotation
    • https://cdn.sqhk.co/fufigavaki/f0jhjLz/block_puzzle_jewel_pc_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kisasizaro/dhewrgg/mafejaw.pdfIn PDF document text
    • https://cdn.sqhk.co/wazilisiko/gdsbHig/settlers_of_catan_piece_holder.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/ja6zZgg/rogue_hearthstone_secrets.pdfIn PDF document text
    • https://cdn.sqhk.co/nazamesuwute/ghchihc/hidden_objects_in_pictures_printables.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/VUibXjh/chocolate_candy_molds_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/h9ibbRT/xojimurotepibuzemoxotegad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://julukawava.epizy.com/59235647776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52cbdd9f-b08f-4e88-b4d9-4b77cc395c92/30551728444.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/john_lewis_online_test_answers.pdfIn PDF document text
    • http://botovomevagexe.epizy.com/ramopokutopivetanefebaxo.pdfIn PDF document text
    • http://rukevojux.rf.gd/tudujidowonon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee979cd-fde9-4dcd-9a92-0f1705697873/2302952883.pdfIn PDF document text
    • http://sisuraregimu.rf.gd/zatofadobirut.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/international_business_jobs_meaning.pdfIn PDF document text
    • http://pufigopinenise.epizy.com/complex_sql_queries_examples_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/pafito.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_off0000e4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BC 5512 bytes
SHA-256: 2459f84c026ae13dffbd197bdd5879afe56aca685fae4e12161c50603a88c462
font_01_sfnt_off0000f75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75E 11044 bytes
SHA-256: 7c2678771fdf2eb6945fff31c9f5767478de83381e4aca7e7e866c50f63bfbc1

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