Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e39f8667ee5371…

MALICIOUS

PDF

80.9 KB Created: 2021-09-22 21:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 85b6f5d0f5219e5a652323b5012a934a SHA-1: 7a0349893fbed14ba5023fbffa04e3086e328b6f SHA-256: 67e39f8667ee5371152ffdac1797bab06153083d88211d2b2e2df4d0fae02a38
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with spearphishing attachments used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://medvor.ru/uplcv?utm_term=john+c+maxwell+5+levels+of+leadership+pdf PDF link annotation
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/7gfc84kl3c69d0hfhvt2uabb92/logikoguvuvagekarowadud.pdfIn PDF document text
    • http://china-shengbang.com/upload_fck/file/2021-9-23/20210923011741434820.pdfIn PDF document text
    • http://tele-klass.ru/i/upload/files/xerurofavadujag.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/34479037263.pdfIn PDF document text
    • http://yogaschoolofkerala.com/photos/editor/files/53821232817.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/30221598152.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/0b7678bc5299ad4f4e783bf0393f36a7/38937368390.pdfIn PDF document text
    • https://bk.knu.ac.kr/ckfinder/userfiles/files/98796341665.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/sepumodagobekesezefibisu.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161433a4e03834---53090774251.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/wufafafa.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/6931084767.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/81062561863.pdfIn PDF document text
    • http://centromp.it/userfiles/files/76078630690.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/xoxututijixewiwuk.pdfIn PDF document text
    • http://slkuang.com/v15/Upload/file/2021912452531097.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/331b155be47fb9e71cf8c8709c295cbf/68637571809.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/zexisetorurok.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375eccd5d2e---sumera.pdfIn PDF document text
    • http://sy-smile.com/upload/files/renenarapikuvuj.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/keruzipumofumobaleje.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/ai2ub76r9990evqo5dtg4lhbm5/lumarutozeliwunirefi.pdfIn PDF document text
    • http://willbramephotography.com/98114902525.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_off0000d6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F5 17576 bytes
SHA-256: c6526fdd6871ef56471ccddef160973a84070008fe8272e4d861307ee0e6e08b
font_01_sfnt_off00010442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10442 11164 bytes
SHA-256: 6f624e282d118f085bc97f24825a0105df81fa5f4f13d570fb0ba8509e4acf31
font_02_sfnt_off00011e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.