Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bcf09455427996a…

MALICIOUS

PDF

82.4 KB Created: 2021-09-09 07:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 25c47413f3263af7a48f816f79863526 SHA-1: bcbdd0121aa0712ef44d851594c58d5df1c20b26 SHA-256: 5bcf09455427996a33d550d7dd685763a996155209e3f7bff8c05a036bdd48e6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a phishing lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions for a password-protected archive, a common tactic to bypass gateway security. Numerous external URLs are embedded, suggesting an attempt to redirect the user to malicious content or download further stages. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://huntic.ru/uplcv?utm_term=ez+month+skin+injector PDF link annotation
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/f7057d9a9a07554c8c7e4b5e7b71d64a/29004965478.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/60668806904.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613564f5ca3c0---vawuli.pdfIn PDF document text
    • https://swiz.eu/files/editor/newujadibebepukuwumelub.pdfIn PDF document text
    • http://movitecnic.fr/ressource/site-image/files/89863712640.pdfIn PDF document text
    • http://tai-group.com/upload/files/79480795425.pdfIn PDF document text
    • http://jinyezi.cn/upload/lezabekupavopovolitovota.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/wafizimuwuzusibusapatawe.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/161370f579d82b---vupitesupimuko.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/46848947553.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210906012702578.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/13413716120.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/51272733058.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134197c3d75f---tupupe.pdfIn PDF document text
    • http://3t-t.com/User_File/UpFile/file/20210906101245_dmVmZXR1bm9m.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/93300634757.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f47096967---76270916880.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/bibododok.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/037f9f8cbcfe48b332255e1779b1927b/nogebojerob.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/vakinoziwivugikuwuw.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/gizadogafepurovuzugivoxed.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/dbfbe9bce790da49f0d0207bfc9aa1ee/duzaxovukowesimexon.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/muzemukogedutisuvukozino.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/kigesagovomuwuwesasutaz.pdfIn PDF document text
    • https://halead.com/uploadfile/1630847179.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_off0000dece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECE 17536 bytes
SHA-256: 07d791ad06aeea7d9a10d0c54e88092eb8e9bd5e4d9db8de731f5e6c787fa1f7
font_01_sfnt_off00010c15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001242c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242C 10552 bytes
SHA-256: b971fac1d3fa4ce7337b4a3e988cd10698e2b3312a227f3a31af2e29c922c427

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