Malicious PDF — malware analysis report

Static analysis result for SHA-256 db8eaf2fa8278588…

MALICIOUS

PDF

78.5 KB Created: 2021-03-24 15:05:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 40e095fb95ec0262c56f48e2bb45bbca SHA-1: bcb700a153e7427a3a0d8882753b99008fef8716 SHA-256: db8eaf2fa8278588f3166b46489edfa0bdea0d38fcc6cd7a26bb46719903273e
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous external URLs, suggesting it acts as a downloader or redirector. The document body, though heavily obfuscated, appears to be a lure related to a 'Saint Gobain false ceiling catalogue', aiming to trick users into clicking embedded links.

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://soxebez.ru/award?keyword=saint+gobain+false+ceiling+catalogue+pdf PDF link annotation
    • https://cdn.sqhk.co/zifeduwa/enggYDT/background_video_recorder_pro_apk_zena_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/mipijotom/hgghigZ/mcpro_app_build_companion_blueprints_for_minecraft.pdfIn PDF document text
    • http://gewebufokorilu.iblogger.org/liwilizufun.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/LrRhdgi/pastimes_meaning_in_urdu.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/peFhhhe/gliders_flight_simulator_2004.pdfIn PDF document text
    • http://zebolalifitu.22web.org/open_android_emulator_from_command_line_ubuntu.pdfIn PDF document text
    • https://cdn.sqhk.co/satukevaguka/Vhajijd/86948116443.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mekazejirorarad.epizy.com/98739961252.pdfIn PDF document text
    • http://rumejumobu.epizy.com/68564022581.pdfIn PDF document text
    • http://xumuturil.epizy.com/depavaped.pdfIn PDF document text
    • http://sipukerafabule.epizy.com/does_samsung_7000_series_have_bluetooth.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/vedunimabezexazajopu.pdfIn PDF document text
    • http://dimavaju.epizy.com/vetuputa.pdfIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_ddb70276927d4fb39e7b3d20feefffa8.pdf?index=trueIn PDF document text
    • http://nilavoforejexo.rf.gd/suwugiwukegapenoxazonibom.pdfIn PDF document text
    • http://nologivarikej.epizy.com/san_michele_arcangelo_storia.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/aararo_aariraro_malayalam_song.pdfIn PDF document text
    • https://1580f21e-fc75-4350-9669-3be8b7525729.filesusr.com/ugd/eff6cf_b76bf3fb01644621be667d144617288c.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e26f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26F 5468 bytes
SHA-256: 0af4e3d909b262f18c19623b00b720e32b71852117db3e627c4794a6c4c03813
font_01_sfnt_off0000f51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51A 9980 bytes
SHA-256: 8e8e37184da48b33cbeb53a8eabf5603442d9d1d161e87bf737c7d98ca726499
font_02_sfnt_off00011758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11758 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6

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