Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd60b9c81eaa6f0…

MALICIOUS

PDF

69.9 KB Created: 2021-09-14 10:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d5dbcd55a3b799f2376b715c57ca184a SHA-1: f175170e9b417e5558a0df1ba519e2eea39eaad5 SHA-256: dfd60b9c81eaa6f08ab00c9b8f725341a13f546dcfad69e46d1d337956aa0e9d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to PDF files hosted on potentially disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138db5ac638a---gufebokikuvujolisofi.pdf In PDF document text
    • https://fonixkoncert.hu/upload/file/8019212429.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/zuzepilonilesasemeravula.pdfIn PDF document text
    • https://peoplesmodelinternational.com/ckfinder/userfiles/files/laxupabasep.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/24461381581.pdfIn PDF document text
    • https://floridagreatescape.com/media/file/79031674740.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/58021647121.pdfIn PDF document text
    • http://hocomesun.com/upload/wozususokeloribor.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/xidemuxobudavemureranamu.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210914142237.pdfIn PDF document text
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/19783783969.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/68706355973.pdfIn PDF document text
    • http://rayanchem.com/d/files/88208222498.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/maruzuxov.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/xemumolamozavevidit.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/31274475739.pdfIn PDF document text
    • https://yam-token.com/business_school/uploads/file/deritevow.pdfIn PDF document text
    • https://ndmoyun.com/calisma2/files/uploads/sidizafelasipe.pdfIn PDF document text
    • http://longbienco.com/js/ckfinder/userfiles/files/lorogumepilefasar.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/90206439082.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/736744888.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/4d4b3e8f8dc5a0ade9780cc9b22f7433/33388889055.pdfIn PDF document text
    • https://ccskin.com/geektic/files/zenuduwilaxudisegadopawi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=zee+tv+app+apkPDF 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_off0000b242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB242 9736 bytes
SHA-256: c20e59cde3d70ea3fef881e34b9326b4b21b8bb1a8d7c77e69739e4569e6864e
font_01_sfnt_off0000c7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B3 17056 bytes
SHA-256: 67fe32a630756e8984496f15081ba11a6a02a5c6047b76d69461148fd8535251
font_02_sfnt_off0000f26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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