Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00e27c46b2ca4d2…

MALICIOUS

PDF

79.8 KB Created: 2021-09-03 03:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2debcc32f6d07cc593d7f06c80084c98 SHA-1: 997d673c17bc0cce41ecd0cc7dd9ddf2536fdfe9 SHA-256: d00e27c46b2ca4d2c9305910ac98c3931acb677406e72394e4eb1bc0e11f0e4e
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of a 'download' button heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://vagtteam.dk/userfiles/Files/nezodat.pdf In PDF document text
    • http://phoiinnhiet.com/images/uploads/files/41632017876.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a01c1cd351b---vavojukotikidunoj.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/8578591139.pdfIn PDF document text
    • https://moolans.com/uploads/files/tuvegitaminebap.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bfacd8e8b3f---20566232896.pdfIn PDF document text
    • http://studioschicchi.eu/userfiles/files/39917252689.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/e2756f3070a9bc4a2335507c62204ae3/40593261585.pdfIn PDF document text
    • http://bakoca.hu/files/file/12057770649.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/44cf9a5e5949e0d151168da61c29a274/59683839646.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/c932990d0e008bbd0a87971e5da9313f/gefovigenuberorufomi.pdfIn PDF document text
    • https://ewt.cz/res/file/70522210581.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/31039794831.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e04d3757f---79342939095.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/42236622314.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/8k7lcb81fegruc4fljbvhjj1d1/95172263224.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/5ffffc35677269b132f50307d92306ef/sedejewuzipe.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/ratilifipuja.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210820045353.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/59772193753.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/53291854130.pdfIn PDF document text
    • http://ranchobg.com/img/file/nutijixinupawe.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a93f0b9921---75158206410.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/rodixafomenitaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=up+board+time+table+2019+class+12+pdf+downloadPDF 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_off0000d090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD090 11476 bytes
SHA-256: 5a9d06e027d3cefcece54ff9764979479b4824fa96c54150ca65051789b50acd
font_01_sfnt_off0000eb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AF 17420 bytes
SHA-256: 02cb6598d37a19a20c44fc8531a702c76f0df1b0900255ab3bf58032003b95f2