Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd3696d7b348780…

MALICIOUS

PDF

60.6 KB Created: 2021-09-17 13:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8737e3a721198dccbf4392753819820a SHA-1: 4adfafefc8282aa390e11942be0a93f40b2c6585 SHA-256: 8dd3696d7b348780030cf64daa0d73f666c4d5604c018ce623df3813e1a62399
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as malicious and a machine learning classifier. It contains embedded JavaScript and numerous external URIs, suggesting it is designed to redirect users to potentially harmful websites. The presence of embedded JavaScript indicates an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6096

Heuristics 5

  • 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
  • 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://huntic.ru/uplcv?utm_term=shadow+fight+1+android+1 PDF link annotation
    • http://kustari.net/userfiles/file/lunopupuwo.pdfIn PDF document text
    • http://paolacaone.eu/userfiles/files/66058690017.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/funog.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/47987540332.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/gasuwowowexanudipiga.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/napelatodukete.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/83469276461.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/15698096450.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/21a62f8cb8e8671010e6e40b9c2979a4/zaxofibexeleweranakisiwa.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16137e27d47c25---xipixar.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/firugafalupedum.pdfIn PDF document text
    • http://attlas.center/userfiles/file/kilolepesi.pdfIn PDF document text
    • https://xuanhongkhang.com/upload/files/21987181112.pdfIn PDF document text
    • http://sangiorgioautoservizi.com/userfiles/files/vegumirowidu.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/jeniwo.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/joretimitolume.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/45399029977.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/79126107250.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/tekikiresivatifitezopukuw.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/jiluvaxoxomi.pdfIn PDF document text
    • https://hojoairport.com/images/file/ganug.pdfIn PDF document text
    • http://gartenbaukoeln.de/uploads/files/63141523193.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/22434271323.pdfIn PDF document text
    • http://grupophi.es/uploads/files/60645428345.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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