Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee29f18794d29b7…

MALICIOUS

PDF

85.7 KB Created: 2021-09-10 00:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 01b7cf60eedb520f3ef7201619a7e698 SHA-1: 362f55b8bd141a49c5d152f43ffb15e759dc3b37 SHA-256: 1ee29f18794d29b7c05bbcc235e966a163f940fec5059fb4213238a868dc0cf3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is designed to host many links on disposable domains, likely to distribute phishing content or malware. The ML classifier and ClamAV detection strongly support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=screen+recorder+for+tablet+android PDF link annotation
    • https://buzascsaba.hu/userFiles/file/muragakobimorozupotozov.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/lojiduvukuxuguvamef.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee4a5440ed---nefejorigovisireferut.pdfIn PDF document text
    • http://dentherapia.hu/files/file/vujopirupok.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/2141565862.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/favavigurixegijuxu.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/96937813452.pdfIn PDF document text
    • https://tckontrola.hr/files/menibogatova.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/161306c59e1d2a---taxazisajuxapepezu.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/jitimiz.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/muxejazotupatunix.pdfIn PDF document text
    • https://bfull.ru/uploads/files/65013084757.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/89716408468.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/13210642021.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/99569572114.pdfIn PDF document text
    • http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/41987547225.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/19043906542.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/dajuxunotusopuvebelizoru.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/zinepadewosef.pdfIn PDF document text
    • http://labuchedeberce.fr/userfiles/file/kifotonosebo.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/zozawojovixenozagidorepa.pdfIn PDF document text
    • http://boschvietnam.com/files/usersfiles/files/bemasisodudexudawigar.pdfIn PDF document text
    • https://izr.fr/files/63135817311.pdfIn PDF document text
    • http://schokoladenbrunnen.de/idata/42568454042.pdfIn PDF document text
    • https://windsbs.biz/files/file/xudijune.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/lireletagepazetusojo.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_off0000e9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A1 18220 bytes
SHA-256: 7905cd7ec22c3e9d201a535ed72e4bcd6a43079a9370acbf9b22c93d3fbc3732
font_01_sfnt_off00011895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11895 10516 bytes
SHA-256: 8baf80fb7fbccedb6148245af19fecda471b8a3cf1d424e39fbb145830ae8695
font_02_sfnt_off0001309e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1309E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1