Malicious PDF — malware analysis report

Static analysis result for SHA-256 b270004dede16dc8…

MALICIOUS

PDF

81.1 KB Created: 2021-09-13 17:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0d106036e18e3e6e76152f85ca7f138e SHA-1: af6686ac681a464244af94423576703b35fe81a7 SHA-256: b270004dede16dc8ce4e71bbcaef06e93bc4a39f61b0f52495f42a08f5b5beab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://smidgel.ru/uplcv?utm_term=boxing+tonight+free PDF link annotation
    • http://nuestratierrapremios.com/campannas/file/2645942377.pdfIn PDF document text
    • https://festacontinua.it/public/file/nobupurivavaxagum.pdfIn PDF document text
    • https://kiptep.ru/file/83064632780.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/kunegopetibupij.pdfIn PDF document text
    • https://bfull.ru/uploads/files/lokifud.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/99539321428.pdfIn PDF document text
    • http://inistor.com/ufiles/files/zomufalaresoda.pdfIn PDF document text
    • http://cbcom.eu/ressource/site-image/files/94346128760.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/wokam.pdfIn PDF document text
    • https://pastravariaizvoarelebratiei.ro/images/file/9140006617.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/tikanilidido.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/nugasunokek.pdfIn PDF document text
    • https://www.oalysa.cz/ckfinder/userfiles/files/bakasomuvemakigolinip.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/dexuvibipatesi.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/14083464818.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/nosupapavejazakerofoxad.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/48701387093.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/pafasapukowobaxowasuto.pdfIn PDF document text
    • http://gyogytornasz.hu/editor_up/70622674623.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/95901204359.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/fepimok.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/forofiritulokukovepuzitow.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_off0000d754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD754 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6B 10272 bytes
SHA-256: bb182465a3848e79b87545ca2ee9cd181f8cfe377fa8e361bf3d4b90ca1ce381
font_02_sfnt_off0001067c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067C 18528 bytes
SHA-256: 8f7a6f7caeab4b469de89fb4f1a7a60a299d3682f82f41c4aad47dff4ca1541f

Open this report in the interactive analyzer, or submit your own file for analysis.