Malicious PDF — malware analysis report

Static analysis result for SHA-256 3146300089b58a8d…

MALICIOUS

PDF

79.2 KB Created: 2021-09-06 14:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5fe226c6ef6c1d183391d5c72837b3ee SHA-1: 15605169ba6c92214bb1aceeb5b460bb7fedc72f SHA-256: 3146300089b58a8d063e0b1ca0563f3533b1191ef858c7cf9ee72e7913224643
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to external websites, some of which are hosted on compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inmaabiladi.com/userfiles/files/98836189835.pdf In PDF document text
    • http://churchtextile.com/userfiles/file/mepurar.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16100d7487961e---vinotiverexivenaduriw.pdfIn PDF document text
    • http://puppiesjust4u.com/clients/c/c8/c8a8d0e690f73854b1e7a5fbb9521f82/File/56948809102.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/c1ec98e94250f255732b161b2630a91d/28478104012.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fbc1d942e15---5983194841.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/8fbqc5npbr21qkm8j32pi676je/jilebijemulugepajo.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c75459bb56c---94048269050.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/fesurudorerozifo.pdfIn PDF document text
    • http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/4798920949.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/22573054362.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/bc8a886efb1544a7f0868fc5d0b77004/rasok.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/10139978487.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/fizapagaxo.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/e60efc1759bcf865e478a6fc8f1be239/kitegekiretimifozaponata.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/72946197627.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7f9003f07---pasonebozotisoruxoveleba.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/580613182.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/28162432116.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///kokanetopegal.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/6ec60af0c947adb4c7fddcc324691e16/24748471227.pdfIn PDF document text
    • http://soles2walk.cz/data/file/45884946466.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bee8b6b1f---42991597045.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=list+of+regular+and+irregular+verbs+with+meaning+pdfPDF 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_off0000c8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10A 11296 bytes
SHA-256: 5a620fd4651013b6a3a860cedc0f917bdca511979db838589483e727eb4c19a0
font_02_sfnt_off0000fb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 20144 bytes
SHA-256: 31ddfe7f35ed51b70dac3a03da9f99ff426f83a697a4ad243f2ad10ce36a86a0