Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd29a0d09c7ae5b…

MALICIOUS

PDF

81.0 KB Created: 2021-04-08 14:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8ff1b99abd9cf2164c5b013a700f312f SHA-1: c0dca15580fd9c36459313a2a0d46eda75afb9d1 SHA-256: dbd29a0d09c7ae5b6538c7d93195cef4f83474b22a094a6bdf235c32823795b9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://jacksth.ru/strik?utm_term=sinais+semiologicos+de+trombose+venosa+profunda PDF link annotation
    • http://konosabidirawu.22web.org/886328557.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/fqhahaC/xusorudofajet.pdfIn PDF document text
    • http://dusanaputojinon.mygamesonline.org/fivukoxolidutujanarabek.pdfIn PDF document text
    • https://cdn.sqhk.co/dewobube/hiaiehe/4_in_a_row_classic_board_game_online.pdfIn PDF document text
    • http://kodavuviguwu.mypressonline.com/searching_algorithms_in_data_structure.pdfIn PDF document text
    • http://dinudavap.iblogger.org/bijosekok.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/business_management_skills_notes.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/jakoronadabofonefuvujeto.pdfIn PDF document text
    • http://gizigevom.mygamesonline.org/acetic_acid_production_process.pdfIn PDF document text
    • http://gosepakaf.getenjoyment.net/the_rock_cycle_lab_answer_key.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://nudagimanefej.atwebpages.com/causes_of_lung_cancer.pdfIn PDF document text
    • http://rurebafib.onlinewebshop.net/26844667665.pdfIn PDF document text
    • http://zapuwoz.epizy.com/gender_reveal_cake_topper_template.pdfIn PDF document text
    • http://wefofumerari.rf.gd/answering_service_companies_in_ct.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4966ae29-1bfb-4c1e-a604-e52e0e0a2bbc/tokeda.pdfIn PDF document text
    • http://nenizumudi.rf.gd/descargar_banderas_del_mundo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f6001ac-293b-4afe-86ec-b9fff81661b5/gavarujudonebifaraz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fc8b8ac-6a67-47d6-9181-4b210ac4f748/who_are_famous_magicians.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b6fcb7e-f502-4804-b565-da9fa0c0342c/49779633127.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED88 5660 bytes
SHA-256: 82d4cbaaac3300fbec5719597d2e78a180ed8a92859759bb02d74cda76bf9237
font_01_sfnt_off000100a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A6 13024 bytes
SHA-256: fca61a8cab5529d660b5134343af45eb4fb2b0f4b20f6ace1188bb6725f01a22
font_02_sfnt_off00012862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12862 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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