Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de12b67937a3693…

MALICIOUS

PDF

104.8 KB Created: 2021-09-06 21:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0e1d8fbb4369002e58302dd521d7bab5 SHA-1: eb783b9166f8feba9cfbd75d19733c22ac798862 SHA-256: 2de12b67937a3693c4cb6ccd71b45172f0ea0c43f49f4390ca9dd297f508252c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests this PDF may be part of a multi-stage attack, potentially instructing users to open a password-protected archive, which is a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://medvor.ru/uplcv?utm_term=proliant+bl460c+gen8+manual PDF link annotation
    • http://immobilieninvestors.de/userfiles/file/jogokomi.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/82b1e8bbc6c9f1566f7303d05cf43a51/42131683675.pdfIn PDF document text
    • http://nhatnguyen.vn/media/ftp/file/79831687506.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zotariladugimelotogas.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/69180412291.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/e24ribitl7d12v7m310gmhivll/lelizim.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/mogamevolive.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/4f8aa6bce36450486188be0562c0639d/bemifa.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/noluwig.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba67655fe59---jeroxusalipixo.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807d34630c7---42062445109.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/lusowefiravutelosup.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1612707b59142f---8435660502.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/61362442492.pdfIn PDF document text
    • http://kpghomerepairs.com/uploads/image/files/gejisuromodasin.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/43fcc0be0fffd265f1e637fe9f297b47/vupuzijutararo.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5302813556---53152782942.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/wotipuwijamimuliri.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/mojetaloxetesufewupap.pdfIn PDF document text
    • https://medbillings.us/lightspeedweb1/file/gikiguj.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/megatitedus.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_off0001300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14820 19532 bytes
SHA-256: 55badd7bc3a61c19ae6e75ba1d80c8bf3406464a32b7ddb4b92777ce2a43bfc9
font_02_sfnt_off00017b49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B49 11224 bytes
SHA-256: 112ff9524ad03dfb82fa4aa79d6429a494062ba9ae0ce9eac2da4d15225577c6

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