Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42d1465371c8f05…

MALICIOUS

PDF

82.0 KB Created: 2021-09-12 14:24:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eea14c9b4a53fc174e02fa37545eab06 SHA-1: 6c2c2e536bfbdf5b552cebaf86c1b80cb1053833 SHA-256: e42d1465371c8f052ef7ac988bc0f93843fce3567c3257793bbdcb2aa82e4734
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://philabc.ru/uplcv?utm_term=lightroom+free+premium+apk PDF link annotation
    • https://anjingliar2.com/contents/files/58223590853.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/63130034125.pdfIn PDF document text
    • http://cottoneauto.it/userfiles/files/10779101721.pdfIn PDF document text
    • http://friulanapanini.com/images/file/62255971342.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/76548712325.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/14109838195.pdfIn PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/lojomuwitunesapuxisivim.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/51809510874.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/kikexuzavoriv.pdfIn PDF document text
    • http://lg-palette.com/upload/files/xoripugifaduseb.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613340b1a17d9---zejojomiwevolefefiguwote.pdfIn PDF document text
    • http://igigeothermal.jp/userfiles/file/dawupoj.pdfIn PDF document text
    • http://descanso.verareyes.com/ckfinder/userfiles/files/mazemebepomemenit.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/17280224811.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/mowanodoweritokedejuzati.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/77065226486.pdfIn PDF document text
    • http://sushistoryus.com/uploads/files/jidilukesixozugo.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/25118098521.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/tifijewum.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/98473942937.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137c2c769c8d---74230647596.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109110327053640.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/mafoxapenuledetalitaruke.pdfIn PDF document text
    • http://mhzsolutionz.com/userfiles/file/31218545239.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_off0000dcce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E0 17312 bytes
SHA-256: edd111756d7f5aaa9117e4d3f1ca57e8e864fa617e28b4434ce9d6159c57ec9c
font_02_sfnt_off000121ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121EC 10636 bytes
SHA-256: 8886f82d96590eef5fe7bd60f4f3fe386bfa9f26b8d6c52e1ea1771e9bbbc68d

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