Malicious PDF — malware analysis report

Static analysis result for SHA-256 bedafc4762de72d3…

MALICIOUS

PDF

104.7 KB Created: 2021-09-02 08:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 98f1e3ece807e2102411e1a78876f164 SHA-1: 62e0e27e21b14aa012f79aa23f2f029b68b683ce SHA-256: bedafc4762de72d36330064f6fe0fb83e3c39bc82af124ca5998917554f75c1e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and embedded URLs are consistent with a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://huntic.ru/uplcv?utm_term=quotes+on+green+color PDF link annotation
    • https://nadinerogger.ch/userfiles/files/63621681214.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/276d01d41e5d46dd298a4bb43fdef458/45757564563.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/jh2m98u2grcn9f0h5i91lklh75/61184552506.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d6cd1660057---10915433453.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/28217750321.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076440a051a0---5355199977.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/9503037389.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/dd64efc602a43c6ff6ead4e2a0aa7ef7/vomabavare.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d656dd50d9---mefevejoxepizuduruwewajez.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/94027730002.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607295b8c8e50---6418942381.pdfIn PDF document text
    • https://vayamcs.com/content_files/files/12013514071.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/40087308172.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c803aab1f---jazikuxoboxujif.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dba656aad---lapetuxiv.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c66041db8---63049181346.pdfIn PDF document text
    • https://lasanisports.com/files/81828851091.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d1915ade56---wavuvuzikefadojadusujabus.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/kagesafekemo.pdfIn PDF document text
    • http://exima.kr/userData/board/file/56557281859.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce39412b6e---85538037644.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf3ed1cc27---bogajazipuxito.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/ponudiwitejupibolimaguda.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_off00013484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13484 10308 bytes
SHA-256: ddc7b03b3367814a5db661c03f0a5c674a81390bf8c4d217c9114eb18d05c21b
font_01_sfnt_off00014c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001641d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1641D 18828 bytes
SHA-256: 422863107b91508e1da6d86923e1669ac2b0c0a1391fbc2e28ea62b235d6ad49