Malicious PDF — malware analysis report

Static analysis result for SHA-256 0082eebef81a95e1…

MALICIOUS

PDF

72.8 KB Created: 2021-03-18 20:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19bd77f1da6a29895e6b8d0958bfc45d SHA-1: e44aac33c3ec76107bac33c494d4f17d59cf470e SHA-256: 0082eebef81a95e17b563b99fdb330a65e7c9664713248006826679e2e1f68bd
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL distribution suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=b+b+italia+furniture+catalogue+pdf
    • https://gozetosudoz.weebly.com/uploads/1/3/4/6/134601595/nezeguzewuzajoloma.pdf
    • https://static.s123-cdn-static.com/uploads/4481424/normal_5ffa1756d4088.pdf
    • https://cdn-cms.f-static.net/uploads/4390382/normal_60312b30d704b.pdf
    • https://pimiwunuxijekez.weebly.com/uploads/1/3/2/7/132741089/wuwidenodaso_pepepewegifujez_juwizezaru_nigedizufinoruj.pdf
    • https://pegujugadul.weebly.com/uploads/1/3/1/6/131637136/1310204.pdf
    • http://wajazenizur.mywebcommunity.org/micro_actuators_in_mems.pdf
    • https://cdn.sqhk.co/kixarozikej/5DPGtqf/youtube_ps4_vr_setup.pdf
    • https://cdn.sqhk.co/xamitarerivu/gijffif/14774619904.pdf
    • https://static.s123-cdn-static.com/uploads/4366381/normal_60010186771ca.pdf
    • https://cdn-cms.f-static.net/uploads/4491412/normal_602d9e8285a97.pdf
    • https://cdn.sqhk.co/kozutani/WKxp4ii/28690796087.pdf
    • http://javefuxola.getenjoyment.net/bacterias_mesofilas_aerobias.pdf
    • https://static.s123-cdn-static.com/uploads/4469349/normal_600361804c373.pdf
    • https://cdn.sqhk.co/xavaxonad/bRgeEhi/disney_hotstar_app_for_windows.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/farezelof/algebraic_structures_solved_problems.pdf
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_d3036d6c408346c2b1e1dc7c81467a07.pdf?index=true
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_1c68a942191a43a385c80b8fb5e46f41.pdf?index=true
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_489d9d6f5ce14bacab2b59a2f3f6ee6d.pdf?index=true
    • http://lafagelupuf.myartsonline.com/23830629877.pdf
    • https://s3.amazonaws.com/rakabexozu/imperative_formal_commands_spanish.pdf
    • http://xurosuforudev.atwebpages.com/balarama_mayavi_download.pdf
    • http://rodexiguv.onlinewebshop.net/debitupuwomipo.pdf
    • https://s3.amazonaws.com/fadedosi/91678102233.pdf
    • https://s3.amazonaws.com/gosete/jeppesen_general_textbook_answer_key.pdf
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_2bc25fb734cd42e2bb0aa56ac9f46594.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000debc.bin
50082442b6349b41f4239e3a5a1e3ad376ce0a532711da4b3e01afdde77a82e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBC 5332 bytes
font_01_sfnt_off0000f0eb.bin
7dc715a79487693cd98696f617f85ea5b0b8d8bacaa0ef83a08c5dac9f6e898b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EB 10800 bytes

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