Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b9e02838af7a75…

MALICIOUS

PDF

79.1 KB Created: 2021-09-02 03:44:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3fe30875092fd57c9a0d50e227f0784a SHA-1: 2e9f2623b419b1a5b34e74ec393906a013c9be19 SHA-256: 29b9e02838af7a7544ddf963654b5ab0413050ac690abcc149f971180ceab578
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://www.mediagrand.hu//data/editorfile/xupipumigatugaxapakud.pdf In PDF document text
    • http://hanasushi6.com/uploads/files/saviris.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b5097dbc1---64024293350.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/xawenam.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/11824243619.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f54ddc28cd---kizijivelovasil.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/98553626638.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838ee308d1c---xufevix.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5270ba646---96793790190.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/759e02b09d4dcb19488050c509279c7a/giregubi.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaf55cc69b---49808848109.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/vetalok.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/meridajakugarixax.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/zutizirux.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/rugimopuloxanetopomozimip.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/57364269595.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/46889326338.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/47466050820.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612b197671dae---ripulojoki.pdfIn PDF document text
    • https://www.privathospitaletkollund.com/ckfinder/userfiles/files/vunujoxarasezoto.pdfIn PDF document text
    • https://koparieshorvathbusz.hu/files/file/59181867223.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=importance+of+group+dynamicsPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE750 11080 bytes
SHA-256: cda4407d5ebf2074b8af0b350fd833c705735e12e6200069268ef47d73eeb017
font_02_sfnt_off000100f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F1 18372 bytes
SHA-256: 230b7dcc218532ac00acec42aa0cce4f56b800087be62b5309f0c713ea666e8c

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