Malicious PDF — malware analysis report

Static analysis result for SHA-256 e793c995d220eb50…

MALICIOUS

PDF

76.1 KB Created: 2021-09-18 08:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2004cabbdc737cefc01b874521c7c399 SHA-1: f5837d13dbf3d0308f34e3b68fbc1ec43341c773 SHA-256: e793c995d220eb50975187b2cea1313956293a6fa636d56bd331225dc8b7d9f0
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability for client execution. The document contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution scheme. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://oniceh.ru/uplcv?utm_term=world+cup+game+apk PDF link annotation
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/24701900730.pdfIn PDF document text
    • http://apartamentykunickiego.pl/architekci/public/upload/ckfinder/userfiles/files/ragulele.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/85274153273.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/f1c0c149abebd4ab1805e0af467e4aee/roradejewagud.pdfIn PDF document text
    • https://nibrasimansch.com/userfiles/files/84416227105.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/22470788919.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/8545e7dc626b1a8b398a96c7077b961c/84446516651.pdfIn PDF document text
    • http://agriturismocorteerbatici.it/userfiles/files/51680940614.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/68142912743.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/85235774527.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/kesodujiguxokobojadosi.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613baff738a77---52498293544.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e2f8baa06f---45816642281.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/zoxenaxuzagimubagasijima.pdfIn PDF document text
    • http://planbmedia.hu/files/5686690912.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/jd6p3brvh13f5tn9pn7qub7jb2/pumedorifudefid.pdfIn PDF document text
    • http://hasicimosnov.cz/foto/Image/file/debigekawanajitoga.pdfIn PDF document text
    • http://onlinevay.com/upload/files/70335488334.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/63737406146.pdfIn PDF document text
    • http://deforma.it/userfiles/files/lopikapanumenuxolimigev.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/e44f02d6fc61bb1285825fe47813d527/67325870414.pdfIn PDF document text
    • https://chaletsuenodesol.de/files/1573393507.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/58156258775.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/92850965382.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_off0000c5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FD 17416 bytes
SHA-256: 8ce896e49a2c1538a8825a94c42076d0dfe20836d0038832251b230e5e7dbf16
font_01_sfnt_off0000f32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B45 10580 bytes
SHA-256: 33f1551cc7a9779b1e15b3ced45a30169cd20d4e74f3e63ab3611e8739c561d9

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