Malicious PDF — malware analysis report

Static analysis result for SHA-256 95c63e9dd1ea297f…

MALICIOUS

PDF

70.6 KB Created: 2021-09-14 16:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2b3ce769a4be9c307ee614ed3841a74c SHA-1: fe2a56c110c32c8a1a032c290536369e65576a69 SHA-256: 95c63e9dd1ea297f289d40fad90f0e3394aaf4e2bd4b224994ec85c799403f8b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs and is structured as a link farm on disposable hosting, suggesting it's used to redirect users to potentially malicious websites. The presence of embedded JavaScript, though not fully detailed, further supports its role as a delivery mechanism for other threats.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=wifi+file+manager PDF link annotation
    • http://solee56.com/ckfinder/userfiles/files/69140718005.pdfIn PDF document text
    • https://newcar-rental.com/uploads/files/202109131144334057.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1613d25153436a---majeruwejo.pdfIn PDF document text
    • https://msvadba.ru/files/file/32180736342.pdfIn PDF document text
    • http://santabruna.cl/upload/file/sugitadosugoxobozuloj.pdfIn PDF document text
    • https://kindeeyudee.com/ck_files/files/letowubazawewi.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/vagejubawuwo.pdfIn PDF document text
    • http://robedecreateur.com/img/files/gizevunobumurubaragago.pdfIn PDF document text
    • http://biosystech.com/pdsFck/file/gipemo.pdfIn PDF document text
    • http://xn--sanitrprofi-p8a.ch/fckeditor/editor/images/file/21065048229.pdfIn PDF document text
    • https://eventaipei.com/upload/files/labezup.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/23705204355.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/petedopumekafinuv.pdfIn PDF document text
    • http://araonline.hu/uploads/file/winarosopovutedafamemo.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/80575319940.pdfIn PDF document text
    • http://willbramephotography.com/wamuselages.pdfIn PDF document text
    • http://ogledalata.bg/uploads/pages/files/davekofalor.pdfIn PDF document text
    • https://vongtaytramhuong.vn/upload/files/54428646466.pdfIn PDF document text
    • http://schokoladenbrunnen.de/idata/kosapawuwegerofofizip.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/36462903581.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///falowizevebamerudolase.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/77798740096.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/rekewesup.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/161396e1ff3d4e---zaxiwaxififizux.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/rifezunosubagela.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_off0000b414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB414 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC26 16680 bytes
SHA-256: 1608cd2f35c75df97b2dd720b37fdc290c9f86372b0e35828e22a9e1a128fd94
font_02_sfnt_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 10164 bytes
SHA-256: 67f6d89e08b2dfdecb84b08643af4312b81e61bd9a200ad6e3c62ae53974eea7

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