Malicious PDF — malware analysis report

Static analysis result for SHA-256 b762022358e3063f…

MALICIOUS

PDF

81.4 KB Created: 2021-09-20 13:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 28463bb4a6c2a170d29d361533639277 SHA-1: a19a3663df36dde40447045feea2e6ff200e98d1 SHA-256: b762022358e3063f48d3bdd378db2a1e81dfd313491f6f124e05eadaa95c8cec
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users to potentially harmful content. The presence of `utm_term` parameters suggests an attempt at tracking or SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://inwebjor.ru/uplcv?utm_term=kinemaster+in+pc+free+download PDF link annotation
    • http://tomaszskiba.com/userfiles/file/68232138490.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5c63de210---54048222485.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16145a430e8f0a---61787822070.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/sifarozikedelajimi.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/todosamo.pdfIn PDF document text
    • https://onthespothousing.com/userfiles/file/69177330854.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/nuwitusokelo.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/e048f868d7cb875dcbd0ef2fec2c2a48/dosaniturarox.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16144660e363a6---dosapilosuziwixajim.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131feb54f9cb---relalukixonitoz.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/nebogebebetumisiw.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/gixoz.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/nozajupokukilel.pdfIn PDF document text
    • https://konchris.com/userfiles/file/1631554945.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/puvixewol.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/17432355628.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/64333334124.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/14969904905.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/lobavo.pdfIn PDF document text
    • https://actorconseil.com/files/file/tavuzatosogibofudumaj.pdfIn PDF document text
    • https://cebrigantina.com/025-CEB/images-editor/file/videfifewezip.pdfIn PDF document text
    • http://runwellconsulting.eu/file/file/juzininodelorilanosuv.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/pefiterinosowupuf.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/fideselobumixu.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/614307c80aad3.pdfIn PDF document text
    • https://kvizek.hu/ckfinder/userfiles/files/5389462180.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://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_off0000d9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FC 17112 bytes
SHA-256: a7eb5e9337b2525afc0d3f25c8500328a75996fef64bfe0d7cba7ee91ffb3e76
font_01_sfnt_off00010647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10647 10860 bytes
SHA-256: 3a451d78606b32c4e2bede52de81e76253c067394a4f00ccef5d2ffab12244f2
font_02_sfnt_off00011f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.