Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6407aa565e2cfb…

MALICIOUS

PDF

96.0 KB Created: 2021-09-05 00:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: eb47ab213cdb47b3d4e9c6a724c2b516 SHA-1: 25675ce546ebc827e93d90581d624e31c80ee269 SHA-256: 0d6407aa565e2cfb8360c7a27010e21f718c8ed742152cb65aac845566beaaf8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to manipulate search engine results or host malicious content. ClamAV and the ML classifier strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://home-consult.lu/userfiles/files/rupevituge.pdf In PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/j00nts9csqr5i2933vorib3r75/muwuzarabineravav.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kh9065k8e3d9ub938gurf1g4k1/92945465390.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/wewurinusa.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/3947a351774ce3b02d3c8819615e643d/33737140323.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/39857238411.pdfIn PDF document text
    • http://szigmetal.hu/editor_up/warewitulidoloxataxira.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/22915571302.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/eacc52d55c86155b9a3bf6bdf40b2edf/13616985795.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c811229a7d---jekevizufajafap.pdfIn PDF document text
    • https://www.nhabe.com.vn/ckfinder/userfiles/files/54031619110.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/gijabukenenelow.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa35b3727f3---mitediwenivenubi.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a6e636dbcc---degavukupexuguwofo.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a90c69f09f2---87979211759.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/41580511169.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/gaxud.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/de139b44ed177935b8cdbdd04e7392ce/dizumatixejutazekunuvijak.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607da7795fa54---80295733213.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/dogoweluxajavunigivifu.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/fma1cj9u8ga5vrkj1v760g0v60/kobofonawunimukoxamew.pdfIn PDF document text
    • https://imagebrandstudio.com/userfiles/file/joponiruni.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/vovef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=siemens+openstage+40+g+hfa+manualPDF 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_off00010823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10823 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001203a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203A 11080 bytes
SHA-256: ac517d1a7f3378e45377fda5400342deaca8b28b4fd682419f013dbc6eade24c
font_02_sfnt_off000139db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139DB 22244 bytes
SHA-256: 6d599027f8deb8714bb7b42dec1701adf6f7860ce20f9167f7ef333ca783a7dd