Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaec3aa7e1c19d05…

MALICIOUS

PDF

71.3 KB Created: 2021-09-30 13:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5cdcce967f9ba728fe8c32b5213c8f8b SHA-1: b022f9857b997713334b74c7a1cb6497e6b35850 SHA-256: eaec3aa7e1c19d0560c16756ce48e3261eeac1df3a96e29597a74bee0d853dd9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URLs, many of which are hosted on compromised or disposable domains. The URLs and heuristic firings suggest a phishing attempt, likely to trick users into downloading malware disguised as desirable content such as game hacks. The embedded JavaScript is likely used to facilitate the redirection or download process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=shadow+fight+2+money+hack+apk PDF link annotation
    • http://language-coach.pl/uploads/files/zotujiziko.pdfIn PDF document text
    • http://quimicahj.com/admin/userfiles/userfiles/file/43734458084.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614d461402bb2---88332025839.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/navogoxaduwuweno.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/vekigogadun.pdfIn PDF document text
    • https://sealand-pptc.com/userfiles/file/33125785362.pdfIn PDF document text
    • https://texigo.tw/upfile/files/2021/09/26/11177005743.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/judinunegolofofamukol.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/e7b25859997771abfc410ecbbc692469/1016312022.pdfIn PDF document text
    • https://inprovitecuador.com/ckfinder/userfiles/files/31255070292.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/34366461161.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144944f2d748---90312594385.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/jeragemolawamipasudok.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/48930606691.pdfIn PDF document text
    • http://unibeauty.com.br/ckfinder/userfiles/files/junemirowipezuxuxigorax.pdfIn PDF document text
    • https://kawinlari.com/contents/files/pekewaropopagavobak.pdfIn PDF document text
    • http://palami.by/images/file/48502749236.pdfIn PDF document text
    • http://jtravel.clickis.kr/FileData/ckfinder/files/20210910_B852AC542AE2E979.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/58967473421.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a3804aa27---70526512946.pdfIn PDF document text
    • https://sharks-cz.cz/images/file/tikozerijuvaxiwipasax.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021092115472259255.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/tebakivigutotipomuguge.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/tulemijavax.pdfIn PDF document text
    • http://recrute.fr/files/files/38892016107.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_off0000b1b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1B5 11240 bytes
SHA-256: 7cc34f052f1f2d308b1e9948870bec6cb87e16bca4242646588f059cdf6a267d
font_01_sfnt_off0000cbd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD4 16956 bytes
SHA-256: 76a0eff37654b021e51d1022c4d536aad05c136c79abae8c0873d781e508fefd
font_02_sfnt_off0000f777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF777 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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