Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f0060ab954fe83…

MALICIOUS

PDF

82.3 KB Created: 2021-09-07 21:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6d6fed9cdb98d61efd0ec7b535fbc2fe SHA-1: 4a48ed2a316b5b064c57339fe047a6a4c4033319 SHA-256: 89f0060ab954fe83c50190528f40df27dc08ffac63bd72db55c7d88cded1b858
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, such as 'https://nomylo.ru/uplcv?utm_term=cyril+ramaphosa+bursary+2020+application+form+pdf', are likely used to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nomylo.ru/uplcv?utm_term=cyril+ramaphosa+bursary+2020+application+form+pdf PDF link annotation
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/3d6b12821ee430589469fe219e314c53/fonojuzu.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/cf4595d63c4000513f6440dccb722ae4/74718334129.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/dexinidup.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/60461389459.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/5208959664.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/9c3d72aa829cc052492d20e81a4e7e76/liwalafudugotopidulibus.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16079db3a8178c---womodamulerurefosilet.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/23125668048.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702c070f829---nukigajoki.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb0265fd8b---waxuxozozo.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/pewubafesakumof.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/2aabe5ovjvd4iojimf1ejldemv/dumitazorute.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/a29d912fdf27854101745c1f6c397c81/67203977248.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/zuzimukavulolodegodolotom.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/st6d07mtrr6tk36pfn42prqv46/tibupenimavuxavexopugedo.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/83153900961.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/66953472665.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/mutanasufiboxesobev.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b03ba19f256---jofezakizalujefekudu.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160781a147ba11---69774498193.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/rijudikatov.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/jurarixevaboleguzutudiref.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/lupibuwuguzonolumebepefo.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/40469600314.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_off0000da46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA46 17948 bytes
SHA-256: 5ac1388a3252772cffc0a648519e0954cddc346575f6bd7272ae6cade59003c0
font_01_sfnt_off00010919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10919 11380 bytes
SHA-256: 45084587e0b8c77f0e1cd104b63eadf48ca93f3b9e525b1bbe138d1c161d828f
font_02_sfnt_off00012390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12390 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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