Malicious PDF — malware analysis report

Static analysis result for SHA-256 686932afaa68d8ad…

MALICIOUS

PDF

84.1 KB Created: 2021-07-03 14:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 24c4adcb96f0f4620f882daa9f71e5b3 SHA-1: bdec8d42ca5f6a7b55c8bad8926aade1eea1af9a SHA-256: 686932afaa68d8adcda224916c6f9cfdf9d96ce4f2a0246cc77bfc74c1fcc570
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm for phishing or malware distribution. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports its malicious nature. The document's structure and embedded URLs indicate an attempt to redirect users to malicious content, likely for credential harvesting or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://cructi.ru/uplcv?utm_term=translate+afrikaans+to+english+pdf PDF link annotation
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/49baa7ff5458e92f59faeca7ce0ec4d1/gobezalinadanejodof.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/85910025765.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/pexudep.pdfIn PDF document text
    • http://web68s.com/upload/files/96430173624.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/48741203012.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/d3928ba786ee059220da71577b9f12b1/3132929192.pdfIn PDF document text
    • http://loveforlungs.com/clients/a/a9/a9a80f3a93b7553e0860ec1960497db0/File/xujevefilimonedalusanepuw.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/22969260450.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/dirabotemomu.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/texuwil.pdfIn PDF document text
    • http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/faniletidavudoso.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65930a86e5---6120575658.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/vbao8dcjnmu1790b93hsi82m6k/70061938881.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088ce67c3e11---38323694603.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/fedetapem.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9b9e2495---39921002162.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/4265a07d8ec687f0444a39f309dc1085/wetagavubulusapo.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/t4mnnn3798hn6cm18ne2um6sj2/pupotogunavefak.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160824ecf0e983---39733720979.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/25718135168.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/jumefa.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_off0000e78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78C 16620 bytes
SHA-256: d95b7f0e6d59cad4cc55968f06a4e17f215fdd0a01fedd25ead482bfe7c29e52
font_01_sfnt_off000112bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BD 10832 bytes
SHA-256: 80147f6465efee9b263c974c3a9a3e2104320e3c70030095eea446ff2bef4078
font_02_sfnt_off00012b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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