Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b70661cdd6476d…

MALICIOUS

PDF

88.0 KB Created: 2021-07-20 12:01:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 1f604dd7629cb6bb651bda53dc55b385 SHA-1: 82dbb935dc1e4ac76b5ae336ff9fde618aa4fbd6 SHA-256: 47b70661cdd6476dfd2b892dce0868ab1daf356c4274f88c115c755f86a8f0a0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/03012aac24f546c0b9f60442ad1cd383/nenemeri.pdf In PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcc58da956---dolaje.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/ee2141231009df03695551130cb7eaff/ralufezusine.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ad3d51aee---sadenutikakapif.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/57602048067.pdfIn PDF document text
    • http://urbancollab.com/userfiles/Proj_Name//files/gopomokirir.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/gepalubusorel.pdfIn PDF document text
    • http://geodez.com/pliki/file/168977840.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/90291846168.pdfIn PDF document text
    • http://charivne.info/images/file/rapunoridopoditojumeb.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1606e69981c368---fatiwojajajima.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/vobifodakilaxezilobed.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-06-18/images/files/sapogewigide.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/dizefaguripowemabojotuxe.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/009853ce01e62ec7c7678b97616a9591/xokasexitigakebibakop.pdfIn PDF document text
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/59e284db3d7d5b3845fde1a531122d37/sokebesulorupivomenameb.pdfIn PDF document text
    • http://rts-3.ru/upload/files/xalojelaxuvosako.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160729bebc5a32---kusopasexavonot.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dc9de3b77---jobajoneluvavewuje.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///1720902751.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160710136069fa---pagupivakinazep.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/9641180416.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/5146c052c21427e1289c1f8f61ee3efb/povefobir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=fsmo+roles+in+active+directory+pdfPDF 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_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 10936 bytes
SHA-256: 8219a6a7923bb9a86acb468f0e7d308400025730c2242e7e17510adb0c4df153
font_01_sfnt_off00010c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C36 17716 bytes
SHA-256: 06a696e426411afdeabb4a8de76f2776020a428c98af3b7e4c9a3857660fe362
font_02_sfnt_off00013ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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