Malicious PDF — malware analysis report

Static analysis result for SHA-256 83c2d19b544de3ff…

MALICIOUS

PDF

67.4 KB Created: 2021-09-24 13:34:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 270eae7eebe8716a61452543323943f3 SHA-1: de08ba257b2134ef12657283a0d9782730bc20de SHA-256: 83c2d19b544de3ff44654e61e7fc19115ae5fed9c5bfca790d1372365cb0659f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs that point to disposable domains, characteristic of a link farm designed to host phishing pages or distribute further malware. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically identifies this pattern, suggesting the document's primary purpose is to redirect users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pixomot.ru/uplcv?utm_term=what+is+the+latest+version+of+tubemate PDF link annotation
    • http://patroha.hu/file/letiwe.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/10564340944.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/67765996374.pdfIn PDF document text
    • https://www.ojchamber.com/ckfinder/userfiles/files/kewedanomuse.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/xawavipasegetowitinezafik.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/29677933726.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613172c7bfe6b---41014482180.pdfIn PDF document text
    • http://sutipatika.hu/userfiles/files/wukasumidikamuvoxut.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/49448254995.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/04fdf785666487f818ab16b9efd5f8dd/99491555805.pdfIn PDF document text
    • http://weiddy.com/uploads/files/202109080853169643.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109071655027575.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/jozukoxawujomewavemagema.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/84265238069.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210915135146.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/14922896412.pdfIn PDF document text
    • https://playindiano1.in/ckfinder/userfiles/files/32907577399.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/nalukupinanupukeb.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/47263050585.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/potikukadodatakolirowojo.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_off0000aa5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA5D 14752 bytes
SHA-256: df140ce433bae3bb86c052e8f679e5b6d4c998acb4680ceb57ca1d7df381e071
font_01_sfnt_off0000cf8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A2 10780 bytes
SHA-256: 0c6f6fc910e5dcf7e52248406a7996b60cb3bed26a89b2a39adb6989a1d392b8

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