Malicious PDF — malware analysis report

Static analysis result for SHA-256 446adcc0276238ca…

MALICIOUS

PDF

69.6 KB Created: 2021-09-30 14:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: b5696e7c853719a332472eca15650c0d SHA-1: 9932e81ed10e76568a9392c2db59b1eff903bfa4 SHA-256: 446adcc0276238cad8f9798d29e69495dbba750f46cdb7ec5561d30527820ec3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://wastran.ru/uplcv?utm_term=aos+tv+live+apk PDF link annotation
    • http://gaushalango.com/uploaded_files/userfiles/files/xapesataxud.pdfIn PDF document text
    • https://floridahouselottery.com/test/userfiles/file/difodulal.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/p9auoso8p0ftr59hvsv0lg1a22/92694527118.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/93792366902.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/vijeliwova.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/46169647154.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/taribe.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614c7c5fbfc8a---nuxinamijewiliwuziwi.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/tegejozifuwowuvubaz.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/xopelenajufizi.pdfIn PDF document text
    • http://kyea.org/imageuploads/nasapezivexepe.pdfIn PDF document text
    • http://snuhonors.com/userfiles/file/53453811552.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/jepukuvanosemidajizi.pdfIn PDF document text
    • https://maryamghiasi.com/images/upload/files/46426233176.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/37342560736.pdfIn PDF document text
    • http://gro-felix.si/uploads/jeribebonos.pdfIn PDF document text
    • http://gzpropellers.com/uploadfile/files/kadapovogaxipubulutajere.pdfIn PDF document text
    • http://magic-mugs-factory.com/uploadfile/files/penebajifuranodapefivufow.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/56252658921.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/zefaberen.pdfIn PDF document text
    • http://intertribo.sk/files/44261027967.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/68682533135.pdfIn PDF document text
    • http://sandlnae.com/data/editor/file/wegoxuridubimirikojanu.pdfIn PDF document text
    • http://burchiellati.com/file_fck/file/fugiladivafakopexasuxu.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/68774325806.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_off0000b01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01C 15996 bytes
SHA-256: 81235ed94204d3b3a50d4151f01e92715c94b586f1e6d034f2a7779e2e5bd888
font_01_sfnt_off0000d8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 10180 bytes
SHA-256: 6c04186e951543cfa43ac488ca3b6085bd76cf4d71365b23e623484d8d7323b8
font_02_sfnt_off0000efca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1