Malicious PDF — malware analysis report

Static analysis result for SHA-256 24bf8b745b05014e…

MALICIOUS

PDF

77.8 KB Created: 2021-06-27 19:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d5fe993aaaec871a270c70a843bd2afc SHA-1: 22b01c05dd1ef4a4d58b8adb47d15fb735d75c9d SHA-256: 24bf8b745b05014e9c58bdfd9b1d2371e6c3fe84945b18f7f51afd6a270454cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://garglob.ru/uplcv?utm_term=dr+hayes+dentist PDF link annotation
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e9da0bdd5---50209120757.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d54b8e108f---87103182219.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/27362059912.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a705cbc11bf---diwotepedut.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d046075e6c---6939902589.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f767261a02---lolekadad.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/molifosimanogagoxo.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/49352311664.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8bdc21236---36707406351.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/vugonojevinu.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/mrijdkrc5c545c0sfkugo3c23c/sapobasuzojatamupegogep.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d85a86d5621---81655649108.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160740341dd029---taxikepujufeluxitexixet.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/tifatunusofurap.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9ade08fd4---52297103956.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/bejupo.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/fisozezirexipanepaxa.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/68424203000.pdfIn PDF document text
    • http://klefmarken.se/upload/file/duzabefefufikexaxakuv.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/a33f31b99a7df2c13b6c32e85d7a014e/81440612573.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/ej6kgmru4p72a04ag34etl3al0/daxivobaxike.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/39dda83c0feb9e510e8d0d56dbe5a8d1/53434240211.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/puzodibaw.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160720075c983f---wefokata.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_off0000cf5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5E 10292 bytes
SHA-256: 8b9002015a4e4d01bda8001f7672cca0532a8aa4b3b43075fdfe09d9c6de1652
font_01_sfnt_off0000e684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE684 16692 bytes
SHA-256: d7f611c93ffba3a557b757ea0e5de1c41e0389aaef090281f50d28257d87b046
font_02_sfnt_off00011212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11212 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1