Malicious PDF — malware analysis report

Static analysis result for SHA-256 2999a48266861363…

MALICIOUS

PDF

73.3 KB Created: 2021-09-05 01:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c3af0e2a25058b18337e2f8e86a732b1 SHA-1: 1b111d179ea6a58bb2ab5f0d49b3896bf8f3b253 SHA-256: 2999a482668613631046d1c58d8605695a819c1fa4df00e771c6ceff5b8b36ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://crewmak.ru/uplcv?utm_term=converting+units+worksheets+year+5 PDF link annotation
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/bf6e121d57762ade51aee6ba843709ac/lemuruno.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/bamowet.pdfIn PDF document text
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/lanuzefafimepowenor.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/gozigujamorivurikuz.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/27590375503.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/bba0335f86baf6997d7740929f1e5a89/18489509373.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/06f8c9089d413fd3ad59f89cca2bd61a/getakukatom.pdfIn PDF document text
    • http://punaide.com/userfiles/files/78826659938.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/t4dkkahe0fehei0cn19v9o3kjt/worotamux.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/vorusazejemixafarax.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160dd8f3b0d766---tomogur.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/85430065251.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/e36e6bf736f828ddc9654ac3f756fa34/77412502616.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/bd7e3d905e40d083968269d3d062ebf2/mejusilepuwomirituruv.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/93757336125.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/4a19103b7d3b7953646443bf6e50036d/wepovinixelenefapaxakew.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/fadetebozaxabopir.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/23657588326.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/60037582826.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082612ea6309---67398987178.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_off0000bd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7B 10964 bytes
SHA-256: 1d1b1e1a7c848432b4832a623342bda00f567fba192fc15849b51e11746902fa
font_01_sfnt_off0000d711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD711 15944 bytes
SHA-256: ff693ab0eda4235a44de48d109896b85ff8aabe35463054a1ee7019cce38f672
font_02_sfnt_off00010033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10033 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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