Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ece94aaadfcf73a…

MALICIOUS

PDF

88.2 KB Created: 2021-07-03 03:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 81b86eb8b2b702a242e592f66bf64bf8 SHA-1: a0605050b4a2f5b9423a0c85b4063ca37f7ac344 SHA-256: 4ece94aaadfcf73a9fcbf1dc563cd1af51e3d8ad49b2f356863d94df610942a5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing and trojan distribution attempt. It contains numerous links, many pointing to compromised WordPress sites hosting other malicious PDFs, and one URL specifically targets users searching for PDF password remover cracks. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document is designed to trick users into downloading a password-protected archive, likely to bypass security filters.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://archism.ru/uplcv?utm_term=crack+for+pdf+password+remover PDF link annotation
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160786d74509ea---15738930382.pdfIn PDF document text
    • https://churchofgodinjamaica.org/app/webroot/files/kabixaw.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3314f03490---gedilal.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/nalezuxasibari.pdfIn PDF document text
    • http://theprintfactoryvietnam.com/uploads/files/wizasodopapas.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/88kl5kqcqs2q0d1l4fmaoq3pt4/kigop.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/wepesejovizaguz.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f11254225---defujabusezidoxaguk.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/16181538214.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096751a38202---linebefexesitifid.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607216713a49d---30043822404.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7a6a66ab5---21214142659.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/kpo6mqt531sm400tv2so5lbb71/wolus.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1b59991b5---99969430905.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/u781l01pc92fm2394jccs9kqb7/ziwonulesamowurapazoxab.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbe73e713d---jomavifuzujekikoguz.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b608aa458ad---miloresuvipiloj.pdfIn PDF document text
    • https://marlin-aquarium.ru/ckfinder/userfiles/files/tuzedesewesuvubezat.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d1aacc3f9---bodalozukizimidezes.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160be6463e833b---85375255145.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/90672443670.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210509202006.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/97236048311.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/ead1ce7e4e921277dec147677b5f12ff/74679674355.pdfIn PDF document text
    • http://gabortech.com/admin/file/lamavawikovib.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_off0000f3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F9 10716 bytes
SHA-256: 83f91092b2701cdac56787333f87cba37b8b543c40d168c67d7c970c8c11d025
font_01_sfnt_off00010cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CE 17252 bytes
SHA-256: 5f81af7ecaa6471d35007689057885df234c60236a00aaeec56ec6dbec38914a

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