Malicious PDF — malware analysis report

Static analysis result for SHA-256 940fe0089fcf57b6…

MALICIOUS

PDF

85.2 KB Created: 2021-07-04 06:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: bce06fe911834bd6bd432b3ab510378a SHA-1: ad73ac1f13ad4bd2e191995ad0a90826ce355e71 SHA-256: 940fe0089fcf57b61c5a5e6c12286cf0d511a58c5ce53e514ed6423c98c5cec2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous compromised websites, many of which are WordPress installations hosting PDF files. The 'utm_term' parameter in one URL suggests a lure related to 'free fire new hack version', indicating a potential phishing or social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/6e52a0aa8cecd539390f0113501fa048/70956207060.pdf In PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/b88187bc0902b7b65854bca5a6cc22a4/43797204026.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/r2lvjbdritab4b4uo62m2tmhna/22377847447.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2d508dca2---fugalapuzexagogexepazamo.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/67710615677.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/49718098454.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/24800348606.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/68osojh38uh9b7dmq74b5kk32q/28631309906.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/hfqv9vndba4lggqt2j06e6r4nr/80441804115.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/091455126723.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/q360b41nmcarevv8n9fb0kdk76/71774520388.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/vajawibojodefexamot.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/nevad.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb121ade5a---48295266664.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/50571046811.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/r7b2mj4cfuqkjjbhjk754vb1c2/xukavenejesal.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60c387a3bf74f.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ae3bf3e87---78478593177.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb57eeb9bf---49909165565.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/b91de015820da614e6c74b88f2bef714/zudotuganolawub.pdfIn PDF document text
    • https://nistd.in/userfiles/file/zukoro.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/eb8552bb45506135d7d25a97167d6a7d/wosedevesegakesitiwidera.pdfIn PDF document text
    • http://sun-tes.ru/files/file/bafozul.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/e6b27336310c90d2766ff6311c22a8d4/ziwuzifadozefosal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=free+fire+new+hack+versionPDF 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_off0000ea13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA13 16924 bytes
SHA-256: 67192f6161cef7db26447113cb3da7679ddc7fc83581c5645d7ff427f659f1ca
font_01_sfnt_off000115e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E00 10512 bytes
SHA-256: 6d6dccfa31d139002377f6d741a8febfb9e9eced07805cffaba93fee86399fff