Malicious PDF — malware analysis report

Static analysis result for SHA-256 205bd58fa692a72d…

MALICIOUS

PDF

76.9 KB Created: 2021-09-02 00:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 29eac7c9b37e2d6fec0c536a6ca5400a SHA-1: 7d3d1ce64d8ebf39b33995f7b4c1e2b968c43bd4 SHA-256: 205bd58fa692a72dd90a39a01ef5ec4901d439b6201c89d68b1f9e8048a2a25d
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier as malicious. It contains numerous external links, many pointing to potentially compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of these links indicates an attempt to redirect the user to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0e6427d3cd5349b683c4aec3ecd68d3f/zamabenidetefizavalupaje.pdf In PDF document text
    • https://moveo-sport.pl/userfiles/file/dudiwefujavopakeve.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/37023996252.pdfIn PDF document text
    • http://chongros.com/userData/board/file/nirexufalazilazalalesikop.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/27762118875.pdfIn PDF document text
    • https://prcomponents.com/ckfinder/userfiles/files/kikotajipugubavog.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/xitirerapenes.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070af311be8d---40957430745.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/liwevagudokid.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/68678503220.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/34728856132.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/xitakevux.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/forimatonixuv.pdfIn PDF document text
    • http://allg-gyn.ch/userfiles/file/70181800883.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160887e5800277---pikukipojonoxusetup.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/959899dcdd6ede49c4e5eb1c9ec6b7a5/89498101741.pdfIn PDF document text
    • https://ocw.tw/uploads/files/82699972925.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/85955593479.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9505e9281---6906370903.pdfIn PDF document text
    • http://voijin.com/userfiles/files/82889132561.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c301fd36bfd---1217594198.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac31f69ff04---33257512069.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/66017957813.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+make+a+cup+of+tea+in+englishPDF 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_off0000c814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC814 16700 bytes
SHA-256: 508176393479cf1232d364a252d9d9f51042ba684f09612e1b0773d0a354dc72
font_01_sfnt_off0000f317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF317 11096 bytes
SHA-256: fc43fef747e614d7b3146d69d08158a05140e9ac33949a4afee8f58229feca60
font_02_sfnt_off00010cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1