Malicious PDF — malware analysis report

Static analysis result for SHA-256 d572014c3448ec26…

MALICIOUS

PDF

94.2 KB Created: 2021-07-03 06:30:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4ce1aa0db09d9fc6c004b94c0b9ab547 SHA-1: 4f79315a518d88b98c48deaff76d83be67a6e0d5 SHA-256: d572014c3448ec26c3f57a7f18eb0a2fb0626097b068e4e7fa65f02dd98d2137
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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 http://altelaw.com/uploads/image/file/logikokivon.pdf In PDF document text
    • http://generale-bureautique.fr/gdb/files/file/8876395991.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/e73602f95e6f18f971342adfbc3f04ce/jemezu.pdfIn PDF document text
    • http://compsult.net/userfiles/file/85757207641.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb7fa3f2d56---tosuzubamasipovufasepe.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091d4d9b87ca---vozirof.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42c57bea98---zidurodosolafusojoxuzeti.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcc5d72835---varakami.pdfIn PDF document text
    • http://doyen.cc/images/upload/File/86986192869.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/venalolajakutajowa.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/j2imm3qsr9eam6664dpgt01fq4/34160069294.pdfIn PDF document text
    • https://aduanaldelvalle.mx/userfiles/file/50242625037.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d737698b27---18640435105.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/61631654473.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077094232d71---59474064148.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/35845947845.pdfIn PDF document text
    • https://deniz-sogutma.org/img/userfiles/file/vokoko.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/23e68d9939ff0992963e50711be79e43/81059931720.pdfIn PDF document text
    • http://vicorsupply.com/uploads/images//files/77993584814.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/ziwowirif.pdfIn PDF document text
    • http://seanmore.com/userData/board/file/45739170342.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/delusebekegiterune.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ccd832866---gifiwolemevofegufe.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c889e15527e---fufujevumuvozigasi.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0484a02edc---41224124981.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=old+testament+vs+new+testament+differencesPDF 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_off000110c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C1 10692 bytes
SHA-256: 4e0b612814375364caf9d2e0d1b8e8be832f061ed8dc7fb3ca7e27d1d8c168c6
font_01_sfnt_off00012951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12951 16256 bytes
SHA-256: 1757cd68fbaa27e86371ede7ee35212477085e95730dffd5bdd55b855719eb84
font_02_sfnt_off00015362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15362 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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