Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2e208f9ee06bc4…

MALICIOUS

PDF

72.2 KB Created: 2021-09-07 12:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6383b755d90e3eb5f65f41e20269d35a SHA-1: 66a0f7811e084cd4c1a7cffb801c7842c7bb3860 SHA-256: 3e2e208f9ee06bc411447b5f31481f5bae2831d842520ffd31bba5ffe360ec28
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting it is part of a link farm designed to redirect users to malicious content. The file's structure and the presence of multiple external links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pixomot.ru/uplcv?utm_term=oil+british+interests+and+the+nigerian+civil+war+pdf PDF link annotation
    • https://muahohangnhat.com/app/webroot/uploads/files/31762948469.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/noxujamokigikube.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16093db6782428---defaxumixam.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/tu0i031ki7i0n7i2m7j5nkfg83/luxesitovejivuju.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/dejafe.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/87d6c23e98b6679205411c7d859e8787/98240035731.pdfIn PDF document text
    • http://constantemail.com/userfiles/file/162291402280058430604.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609744ec28117---87483742663.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56c9482c48---80757829153.pdfIn PDF document text
    • http://bosch-service-center.ru/uploads/files/fajemepigodebutitip.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/91900564460.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd5e66bb992---46615456168.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/do6uo5g10qatka010ehcg53e31/93674655617.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/40386253280.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/xilitore.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/16947165920.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/37880932652.pdfIn PDF document text
    • https://tvsporedi.si/vsebina/wanivo.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161280f613d2a5---sinunaxogigexidumiwawo.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607540f9f0aa9---rabixujunadetida.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/67447382304.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/4evdf4p93tiqhme71crq50nojm/1919430178.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/vqf8j01skdihqohckcfqbl7q67/86478955402.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/xavazixoso.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_off0000b990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB990 15604 bytes
SHA-256: f99be74420fcc43b407e84696c06c31b0ad4830521958a3692711de526ce7ba5
font_01_sfnt_off0000e1b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B1 11096 bytes
SHA-256: 3d6652d69f5b46b8a641ff4d05e8c4277d41a34f445cf61030ba8c6a292d890f
font_02_sfnt_off0000fb2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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