Malicious PDF — malware analysis report

Static analysis result for SHA-256 02418a784a35b631…

MALICIOUS

PDF

99.5 KB Created: 2021-09-04 13:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0acdf8d8fee9e479e5d3b199677ae5d1 SHA-1: 56017e1be7b0cc947fc4714e2f34ae1924135d9b SHA-256: 02418a784a35b6313d2d9723af758d9500984be1aeaf791feaf87e868f7a1188
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous external links, including one pointing to a compromised WordPress upload directory, suggesting it's part of a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, further obscuring its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://garglob.ru/uplcv?utm_term=organisational+power+and+politics+pdf PDF link annotation
    • http://files.ibiza-ferien.de/file/22926822643.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/34748474818.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/dedotivezabo.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083349178a57---58035549938.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/ribevopuxen.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160e2201bcb5fd---73422508110.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/rirexalezasubiwuperox.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/4332d572b9cf20186a13c2b9c4468974/pijaxofugobavenet.pdfIn PDF document text
    • https://tagoproperties.com/ckfinder/userfiles/files/16680048482.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/60017682093.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a27c1e1b0f7---kipijixenu.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/d8ce962afbc5466ba26975fafc5ed425/ditunob.pdfIn PDF document text
    • http://ciskmv.com/css/file/minetavipojonus.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/17108373345.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc12f3326b0---tilozemewulezibanomu.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///47425061693.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/045dd49628d54785d0dd76873537b163/xiwiso.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/d3ecc0e71e0a06cba09c49a2de43e356/gekarunazisupamixasutid.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/1ec3d0b49662cc3f408294c4d3824b2e/36476449351.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f12e69a95---17062561771.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/4b572372b6bbf8e62a79f1e875bd22b5/4085919485.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/7b471b4f8c10654c51d8bede1a25149b/38441385254.pdfIn PDF document text
    • https://wineart.online/userfiles/file/fekagexalifub.pdfIn PDF document text
    • http://nhhs78.org/clients/63854/File/seganopu.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/56337285099.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/fuxabipixivina.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_off00011d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001356f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1356F 10908 bytes
SHA-256: 9a3fa38efcc80d8c403f5cb341e5c5db02bcf3776f29649b1a638ac9b3652f46
font_02_sfnt_off00014eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EAC 18784 bytes
SHA-256: d3c790c11e1360bb0f044be6c077b34bd988dea87a73a61ed0e922a3eadeccc1

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