Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d8c147049375c6…

MALICIOUS

PDF

80.4 KB Created: 2021-09-12 02:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 01f265ae8f4b11009c9736e6bbe84e9c SHA-1: a488848f7aec0c12f3f7ddd3d88ae4ddf734bd3c SHA-256: e2d8c147049375c6c09454529a47c79a72a371bf896146d81fcdc2ec2779fd82
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external URIs, many of which point to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.injamal.es/nueva/ckfinder/userfiles/files/pekegofikeg.pdf In PDF document text
    • http://kasaitogo.com/uploads/files/tetufezotaxuxobel.pdfIn PDF document text
    • https://paperland.bg/uploads/file/zepitibojitanoj.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/gomafukazozexufuwate.pdfIn PDF document text
    • http://vector-mebel.ru/uploads/files/84594790098.pdfIn PDF document text
    • https://drosamahetta.com/userfiles/file/35369446342.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/muginavixekifonojefa.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/kekuwubemozitunex.pdfIn PDF document text
    • http://chpcentre.com/files/file/vupotujenejefasonixopir.pdfIn PDF document text
    • http://wooshin.kr/uploaded/file/81257246661343700a079d.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/muwatavubogo.pdfIn PDF document text
    • http://murasakijr.com/uploads/files/levefabagevivemener.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/18504243925.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/3587005238.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ecgkgn8gd989cjn0p0nlc4enr9/28123705199.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/vozigokepafevajowesebe.pdfIn PDF document text
    • http://vindindex.nl/images/uploads/82753531048.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/10823380313.pdfIn PDF document text
    • http://mocphatreal.com/assets/images/ckfinder/files/nogoliwegobasiwov.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/doxabajadu.pdfIn PDF document text
    • https://eagle-aviation.com/userfiles/files/23013557114.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8d9e7985b---84229092125.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=emulatore+terminale+android+comandiPDF 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_off0000d77f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77F 17176 bytes
SHA-256: 8a7a34c616bf99422324e70927a2cf888bce172eec329a962760a888b06e11e2
font_01_sfnt_off00010438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10438 10444 bytes
SHA-256: 017543879620bdc51d7ce54965bf8faee12ec01ec5500ae06af92edf9f00e78b
font_02_sfnt_off00011bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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