Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e6e94c18825ff6…

MALICIOUS

PDF

63.7 KB Created: 2021-09-21 17:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ea0056c02dd65f3fbf6430aff775d0ce SHA-1: 1284821116e32d2110422bcb05b14d3aa9d8b214 SHA-256: f9e6e94c18825ff6d1c66684bfc0f6d0071da49b50fd8d30156bc818598b3b21
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The presence of a 'download ps4 emulator' UTM parameter in one URL hints at a potential lure for users seeking software. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • 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.
  • 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 http://www.satunatc.ac.th/ckfinder/userfiles/files/78750962996.pdf In PDF document text
    • https://trouver-une-ssii.com/img/pics/files/92732021107.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/gumadaxigonuzenakakurugu.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613846bc8a6d9---54530525182.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/22443409769.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/68095579816.pdfIn PDF document text
    • http://contelex.it/userfiles/files/83604828011.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/46824479859.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/57868408089.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/83624015808.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/penezudubosu.pdfIn PDF document text
    • http://fibertechnique.com/tmp/file/mezolikuboxi.pdfIn PDF document text
    • https://bacsionline.net/userfiles/file/89975658340.pdfIn PDF document text
    • http://youngdongtec.com/userfiles/file/rukopolejunesin.pdfIn PDF document text
    • http://smartraoptics.com/fck_filemanager_upload/file/87323875592.pdfIn PDF document text
    • http://labradory.pl/file/kesetuguxetuk.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92143607195.pdfIn PDF document text
    • http://birdwatching.sk/media/file/mugenexamapifinivunoj.pdfIn PDF document text
    • http://piqiso.ru/userfiles/file/27600431451.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/ranajunudedepigok.pdfIn PDF document text
    • https://bvphcn.bdata.vn/upload/files/65325159773.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/40978784476.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=download+ps4+emulatorPDF link annotation
    • 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_off0000d34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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