Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4fe23589316565a…

MALICIOUS

PDF

85.8 KB Created: 2021-07-17 03:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9c05d14120ca8b79825cb5009e904539 SHA-1: e6f1b74ac6605da4ae6f2d3edf59c84e22873f95 SHA-256: f4fe23589316565a8ce349898f837b6c94796375718079c6f0233476baf457a8
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://minuspk.ru/minuspk.ru/userfiles/file/zitanenutikalosasexexenas.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f89770dd4---beraxetubaxakozutakifinep.pdfIn PDF document text
    • http://fernandopelosini.it/userfiles/files/78620432132.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16092480aba7be---vuderumewibilibaluleziken.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/ut2g02vvhd9oi1s6kf52q8qiro/13277291657.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/pafuwasitat.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/riwiludulija.pdfIn PDF document text
    • http://donghotam.com/luutru/files/48532425111.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/56084630189.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73908852456.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/eb3f1pfscr1opioleuc6lb1pf3/81268337812.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609440233b4e6---3013197572.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/rogigofimowomiduk.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920b9a1d58a---10842876454.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/2715255c39d9eb75cb74aecd44b926ca/88726654250.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16075e6ff68787---57289891299.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/24214868695.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d31fb3c851---futozifi.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0628/e6db47516a8daccc3753c602847debbf.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/57689581000.pdfIn PDF document text
    • http://cn-daomeng.com/upload/userfiles/files/37409e455ae32e7a43868af7dc3a6891.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c4e838e9469c4d5fea5ad767414a8ef0/13928275298.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/31946554208.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/fegiduzuxegoxowuporalo.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607835e1e5f7b---kelimuzenitalados.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/razobodotusijesigukelo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=jamaican+giant+anole+for+salePDF 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_off0000eaa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B5 17608 bytes
SHA-256: 4aeaad356b6bbe18d2b5cd102a134db00371d75c539bf3f03ca6b351545626c8
font_02_sfnt_off00013145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13145 10672 bytes
SHA-256: cca56f73232d330eb7f0035369014282384e135f9c572b67ee310e429ad5f778