Malicious PDF — malware analysis report

Static analysis result for SHA-256 e389553e55cfac3c…

MALICIOUS

PDF

82.6 KB Created: 2021-09-22 10:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1cbcbc16dc7ac7e79e98f0e6427fb206 SHA-1: 7b2cf3038fd244698db6c53c24a9c5c66397aa8f SHA-256: e389553e55cfac3cd96951fecf8479fa23dd60044fa647773a1e9022251d099f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to potentially malicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded JavaScript suggests an attempt to execute code, likely to redirect the user to one of the listed URLs for further exploitation or phishing.

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 http://amandatour.ru/js/ckfinder/userfiles/files/49485579882.pdf In PDF document text
    • http://shinies.ru/img/lib/file/povufebovapi.pdfIn PDF document text
    • http://zs-g.jp/app/webroot/js/ckfinder/userfiles/files/bobumalukuwix.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/65792384569.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/94488791130.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/wajefubewobarizopogasole.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/861038852.pdfIn PDF document text
    • https://blueparadise.pl/userfiles/file/pejerufuved.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/lafkpjl0jro812mbi3a8vrod83/94583279177.pdfIn PDF document text
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/66128854133.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/bejaje.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/76343645640.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/lizapi.pdfIn PDF document text
    • http://ng-sons.com/userfiles/file/pebipe.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/51104052515.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nozonurobunutizunedowilaj.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/97601041322.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/43528306730.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/warozovewalakodaluw.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/34744418727.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/25658295409.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210919_114314.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/82690679950.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/57071790173.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=best+free+pdf+viewer+for+pcPDF 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_off0000dd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF557 18268 bytes
SHA-256: c1ccc9d467a952d534a94f585c3e6bb971c9c4ed7fa3e12a5342f62586fc588e
font_02_sfnt_off00012479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12479 10504 bytes
SHA-256: 758bc3947d5d84614bfba40b3431d491cda7d66041568b374d0ea0cdf8a65fd5

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