Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e4aee2ff472d6c…

MALICIOUS

PDF

79.6 KB Created: 2021-09-09 13:14:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c2706e277e30616486de08a235901d4b SHA-1: 1ea4bee57722cba9f189df4c0dccf7cb1edd992b SHA-256: 49e4aee2ff472d6c0edd43930b755b51ce2bc4c94dd1d5a18d453f6fe75bdeaa
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm with numerous distinct hosts, suggesting an attempt to distribute malicious content or phish users. The embedded URLs, particularly those associated with the link farm heuristic, are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7217

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 https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613932dda8b1f---mowesa.pdf In PDF document text
    • https://pensiuneaselina.ro/userfiles/file/319474817.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/robekasosaxenigor.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/pasagosida.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/letejiwanomanevajuro.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/reruritili.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/zidotasofe.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/tebuzufeni.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/77519471948.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/gavutakuraf.pdfIn PDF document text
    • https://sanagustin.cl/files/faxutokidorevuragefat.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/53893017413.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/ralexexixuni.pdfIn PDF document text
    • http://schubert-hh.de/image/file/dawevumomadekaxuvu.pdfIn PDF document text
    • http://longarmquiltingacadamy.com/fckeditor/userfiles/file/89401868163.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/sigevagudi.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/11535466417.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/80958388067.pdfIn PDF document text
    • http://hk-bbc.com/upload/file/25960923318.pdfIn PDF document text
    • http://geasit.it/userfiles/files/divinadisotasevo.pdfIn PDF document text
    • http://nagyberki.hu/sites/default/files/fck_uploads/file/joxovibujud.pdfIn PDF document text
    • https://apra.pl/files/file/72186566147.pdfIn PDF document text
    • http://all-premium.com/user_file/files/gexexupixod.pdfIn PDF document text
    • https://wittnebel.dk/file/jidakovifasapemefidebeji.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210903202655.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+unlock+android+phone+forgot+patternPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF479 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8B 17916 bytes
SHA-256: d88eb4bd77d993b94f3a0a80ee3d25e48b732e1fbc3dca49ff68b5fb47ef8592

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