Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce867b8d5888884…

MALICIOUS

PDF

92.4 KB Created: 2021-08-11 20:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 112d2e772fbc6743f6fce39291d31b58 SHA-1: cc7c5a75321223b9278fb8572afbdd4f4b10467a SHA-256: dce867b8d5888884960cdc89f331d12b8fe18e0716e65db5e89be6b3ec8b61a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to external websites, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://synerhu.ru/uplcv?utm_term=how+to+pass+bariatric+psych+eval PDF link annotation
    • https://noihoithanhtuan.com/media/ftp/file/xejufopabanesifenin.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/19392372343.pdfIn PDF document text
    • http://stembridgefamilyreunion.com/clients/0/0d/0db03be1a97f3028174cafb645c8c91f/File/99349402421.pdfIn PDF document text
    • http://farashimirooz.com/files/95539583092.pdfIn PDF document text
    • http://messtores.ca/fck_user_files/file/32421996939.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/56963503445.pdfIn PDF document text
    • http://119pump.net/d/files/tixitorazupupopasorotuk.pdfIn PDF document text
    • http://cascad-trans.ru/files/zived.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/25234726.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/lanaralamarokilapadigi.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbfd870d71---28291830226.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/49626033856.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608484bd8e165---gojujimafuneg.pdfIn PDF document text
    • https://marijina-romarska-pot.si/userfiles/file/tilavijifi.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160da3efa78c85---wanitavelel.pdfIn PDF document text
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/pafuvozuginamofotodo.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e042ef0cb2---fonuguz.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/4959deca01c5a9a63caefc1f5d678e18/wesevufavasarefekevogiz.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021050912084162.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///62059505219.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/korinuxavaza.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdc120b455---regilotupavagorokerazori.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608395c3d56d3---puzidadinalufifod.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_off000105cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE1 17164 bytes
SHA-256: e60026d3a205e07eb38189d347c521cbcbeddc95729908320c59ab9743ea83a7
font_02_sfnt_off00014a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A84 10764 bytes
SHA-256: 4812ebe21bdd5afdd832bf05ffc8fde6d5002394751dde7debfcb399c60558ef

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