Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5aee8b406e32b3…

MALICIOUS

PDF

86.8 KB Created: 2021-08-05 06:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 18f4dee0b245fc8bdc0fe9496b4b6782 SHA-1: d5eeef833f67636f5658501c87307128ede9da0b SHA-256: 2d5aee8b406e32b3b9cf80ece568a52f68dd49495982c13852473d1c29ad1a63
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, indicated by the 'SE_PASSWORD_ARCHIVE_LURE' heuristic. It contains numerous links pointing to compromised websites, likely intended to trick users into downloading a password-protected archive. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the presence of embedded URLs and the link farm structure suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://refour.eu/wp-content/plugins/super-forms/uploads/php/files/291499046e8781489a100125b5034bef/69853533560.pdf In PDF document text
    • http://richmediahouse.com/admin/uploads/file/807527334.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/8791241158.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160f360b3b8079---40309205314.pdfIn PDF document text
    • http://unesco-mediain.cz/fckfiles/file/sodulukawelumudibefepiwev.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/75742211916.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/f9ofahmlka2t9dvkiogo8cti1v/nerelugikixovusapilaj.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/52862545323.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/12482715188.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/d809c7eb523c22ad5492cc9f496f8b3d/14308815299.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/wopakejimoxadexagabix.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/ce8d339f61ede73c83966c75a0fa597c/latudogimadusakakifevisi.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/41822432676.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/e0ee237e98d5f7e9afd6b3258f192634/25081442825.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b31855235e9---zamelumomesudawaf.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b59c53d5f---fonozoradatoriposifovaza.pdfIn PDF document text
    • https://projectmine.hu/ckfinder/userfiles/files/begexajogofigiw.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a745b1958ff---19696573240.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/41337684198.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/3e5bfa57f1ab8ee07c7daf16b7adfb41/rijoz.pdfIn PDF document text
    • https://verandapattaya.com/userfiles/files/22772318765.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609faf389de59---20719330535.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/43564513352.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608418a267b4d---jokagezu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=dragon+ball+z+shin+budokai+2+psp+iso+save+dataPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC2 20012 bytes
SHA-256: 3b4d283ee6b17671ae2a08972cff6c1b4dccef716012058ea928947b4dcdb17b
font_01_sfnt_off00010d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12539 11252 bytes
SHA-256: d2a6ae7c9733060eabbf476d203c66e52c8510fee6d1021fd3e44f5be852e2cf
font_03_sfnt_off00013f2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F2A 2908 bytes
SHA-256: 7eb6f0e53566b63659d15636207e5958045ea4ab548470072e7a6fd860d1d809

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