Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c77b315cca7b2e…

MALICIOUS

PDF

69.2 KB Created: 2021-09-20 16:23:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 62c651a05733017c2fa891412bd326ae SHA-1: d793fe98ea5da774da52f92f9eb808ee4ed16eaa SHA-256: 64c77b315cca7b2eb5a37582218e833cea84bc8b19828c9b8dd485d9fd251bac
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7082

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://chcial.ru/uplcv?utm_term=rising+force+full+album PDF link annotation
    • http://www.neoneofitou.com/ckfinder/userfiles/files/nurojivubed.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc060ca47a---famimozupidapawakujalowi.pdfIn PDF document text
    • http://precisao.org/files/files/miriwep.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/vesomixasimibafelofero.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/fimebi.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/fulinupuwelanowavevimowep.pdfIn PDF document text
    • https://m3nan973ru5-pa571.com/contents/files/jegixekapizosivigat.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/dafodixos.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/ruxajorupa.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/96380501594.pdfIn PDF document text
    • http://rrmkaryacollege.org/rrmkarya/userfiles/file/gegotemiwenex.pdfIn PDF document text
    • https://dhrc.in/userfiles/file/modulugiforuzepu.pdfIn PDF document text
    • http://ubytovna-krumlov.cz/userfiles/file/lakitazufelularexexag.pdfIn PDF document text
    • http://avs-market.ru/admin/ckfinder/userfiles/files/runukezosapunitaturorobu.pdfIn PDF document text
    • https://www.servicespace.org/inc/ckfinder/userfiles/files/kujodaxitovof.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/mudamusotusamuvamoribaju.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/82539689570.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/23748850634.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/bebumujedutarusinexuwa.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/161485d16ed2d5---10825222905.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/sazajeramaxewog.pdfIn PDF document text
    • http://megalaserasia.com/upload///teliwokubunolugarike.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/27281979643.pdfIn PDF document text
    • http://lamorenj.com/userfiles/file/zujevakemowoxabopuv.pdfIn PDF document text
    • http://eternalcycle.com/FCKFiles/file/savipugodopividarokubi.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1613bda6f01558---99767934478.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_off0000dd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3E 16372 bytes
SHA-256: da1c7d6b5b5b4a6d75a1c88c2e5a59fd9c33cee9e30bdaddafe34e09410e3046

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