Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e039e92e8fc577d…

MALICIOUS

PDF

83.8 KB Created: 2021-09-17 07:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9783f14a9cb41e440757d0453da2ccf4 SHA-1: 00753131dc16b2f855793f9df10a4bc87f620c64 SHA-256: 0e039e92e8fc577d78ee9d364a247e1594e24084492fa7f73ce0f5c1f4f0fc8b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to deliver malicious content, likely disguised as a downloadable file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613754a4eed73---lepigiwivesogiwik.pdf In PDF document text
    • http://caopump.com/admin/userfiles/file/budemumin.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/9d0481b1315ed2dd364fa2a8ce226b51/zevujitawikavoxojojamaz.pdfIn PDF document text
    • https://flavio-tonon.it/public/file/vuxofinagigivotop.pdfIn PDF document text
    • https://orrizon.ru/images/file/zafagijiduxaromitoj.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/fodomakeraneduwer.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/jezosixatodalazirawajak.pdfIn PDF document text
    • https://coevent.ru/upload/files/fisavumokefagebumerubug.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/95326918873.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/gufetajelavumalesijajujav.pdfIn PDF document text
    • https://mandarinusa.com/userfiles/file/1631611289.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/2694513530.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/33244463133.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/66212831618.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/42611432676.pdfIn PDF document text
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/27881040827.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/6199590518.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tuvamezufagaloka.pdfIn PDF document text
    • http://geosond.pl/userfiles/file/96615480508.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/98316992035.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/4723553564.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/24594958651.pdfIn PDF document text
    • http://lindendirect.com/ckfinder/userfiles/files/nulonatolosimumikivelitiz.pdfIn PDF document text
    • http://xn--12cxa2boh7cd6g7anex5omh.com/ckfinder/images/files/kizimikaxokavunelol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=super+mario+world+zipPDF link annotation
    • 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_off0000e3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E2 10504 bytes
SHA-256: d98e30f0784454bc26056531e0ef60b085611ac8b2b210966caa0c706305193d
font_01_sfnt_off0000fbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD3 17648 bytes
SHA-256: ebbe980eb787151fad6d7f1f0d90a01f136a1eb092aed1989975f5d59d52e44f
font_02_sfnt_off000129d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1