Malicious PDF — malware analysis report

Static analysis result for SHA-256 beb884ce08c3dcf9…

MALICIOUS

PDF

71.1 KB Created: 2021-09-14 00:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 515ddf83efb8775501ac7bc18e0b1655 SHA-1: ffe4df6bdbe78f1ab1f2df7cd9215fa123b02114 SHA-256: beb884ce08c3dcf94780f98a747f91c721fe704a9ddc1e2473b7a983639654ed
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of numerous external URLs, many pointing to PDF files, suggests a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities or social engineering to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://drafthe.ru/uplcv?utm_term=web+series+downloading+sites+free PDF link annotation
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de2f2c0a65---ganigivosudeginex.pdfIn PDF document text
    • http://rileyillustration.com/images/agency/files/pemafofokimek.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/jubovit.pdfIn PDF document text
    • https://parkettworld.com/upload/files/popagekatebigasawiron.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/pagiledusurimuxi.pdfIn PDF document text
    • https://polaria.cz/images/file/40106034660.pdfIn PDF document text
    • https://wittnebel.dk/file/66743822747.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/63943991426.pdfIn PDF document text
    • http://lica.plovdivweek.com/js/ckfinder/userfiles/files/93151867506.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/tewugenewefasuke.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/30574765188.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/basefisofozubelis.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109120713246941.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/20930556295.pdfIn PDF document text
    • http://88cpap.com/userfiles/files/17266782429.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/vewivevedib.pdfIn PDF document text
    • https://www.tvmreza.tv/ckfinder/userfiles/files/zonutokofakem.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/32067791270.pdfIn PDF document text
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/raguxikoledorapepujo.pdfIn PDF document text
    • http://yarpb.ru/pic/userfile/17200969185.pdfIn PDF document text
    • http://e-menu.hu/editor_up/retiramabimajisezu.pdfIn PDF document text
    • http://frankslawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63950186425.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/27251145498.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_off0000b447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB447 10748 bytes
SHA-256: 84472cd4862516ff9e1ca809e07c1495c14b8d3882b97172911de1e0c9c88c06
font_01_sfnt_off0000ccf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF3 16328 bytes
SHA-256: fd4c7f30c1ade6b5de1155b13261ee06ba4b934dc604c6fba3578990dcda0faf
font_02_sfnt_off0000f6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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