Malicious PDF — malware analysis report

Static analysis result for SHA-256 406983d76338ce44…

MALICIOUS

PDF

73.4 KB Created: 2021-09-11 00:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 722ce88f59fd6b5aaf44dbde0fcb6f4d SHA-1: ea02d1b8b8d2b3f9f6bd9f8301c1ed76b51738a9 SHA-256: 406983d76338ce44514f1d6d86367bcf89701c489470cac9f4198bc1293453c4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are presented as download links for movies. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being used for phishing or distributing malware. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=a+quiet+place+2+full+movie+download+480p PDF link annotation
    • http://ck-tct.ru/userfiles/file/zanudipawagokenigasava.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/jizaxor.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/maxakikalavu.pdfIn PDF document text
    • http://trip-sale.ru/userfiles/file/79851102407.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/31220220712.pdfIn PDF document text
    • https://menu2uplus.com/images/file/kibopajuvid.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/19d7ae7ef4d8e8f8d89301f3fbf4cfe4/84638673516.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bccdfc1ea6---fukujavaforiwemovu.pdfIn PDF document text
    • http://spellenindex.nl/images/uploads/42881894568.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/rapujumijosumoxe.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11806338497.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/7623944685.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/44452609942.pdfIn PDF document text
    • http://jj-metals.com/userfiles/file/2021090707570073499.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/janidibamedijipunoji.pdfIn PDF document text
    • http://scpt.it/userfiles/files/49755229992.pdfIn PDF document text
    • http://achwvs.love-mrt.com/upload/files/12461619896.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/43634853028.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/mewekokovegi.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/wesisemuxogab.pdfIn PDF document text
    • http://kietminhrivet.com/upload/files/59202459935.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/24399985079.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/bepejikinuperureremorido.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/febiborudolobosaferiveval.pdfIn PDF document text
    • https://coffotea.com/uploads/files/202109101456523845.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_off0000baf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD309 11420 bytes
SHA-256: 3f33293bfd6b33613898d7df8de6181e3d2542fe8e6e4a299ceacd4206f60cd1
font_02_sfnt_off0000ede8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE8 16272 bytes
SHA-256: 45e7858b4df195f77a6eb2b9da289e5652185af7577aa38d3bf4291daefb7b87