Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e42e54a654b318…

MALICIOUS

PDF

116.6 KB Created: 2021-09-19 09:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dca20026aeeae77605ac11f4ae86780d SHA-1: 9bbf93c084c9acb53bf2e79292450851bcfe1d8e SHA-256: 16e42e54a654b318e4b5ae78ed3408703b996a9069f8751dfe6414c713b8448e
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious payloads or redirecting users to phishing sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links pointing to distinct, potentially disposable hosts, suggesting a phishing or malware distribution campaign. ClamAV detection further confirms the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6136

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 http://rickgrisolia.com/userfiles/files/22341527648.pdf In PDF document text
    • http://ayurvedicclinic.org/userfiles/file/77436572089.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/29795387477.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/32912356641.pdfIn PDF document text
    • https://krafteco.ru/uploads/files/kuvupebivilute.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b39c3f21c5---xejegawosekem.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/57529057333.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/95609097660.pdfIn PDF document text
    • http://uniontsg96.ru/admin/ckfinder/userfiles/files/33536960130.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/38983674361.pdfIn PDF document text
    • http://kingsfinancialconsulting.com/userfiles/file/64126505028.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/siziwurogut.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/3a8d94a62a8f0acc95e062b29ce9a5ea/50540009538.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/25331437460.pdfIn PDF document text
    • https://architektor.ru/uploads/file/10202371223.pdfIn PDF document text
    • https://walkandsmile.com/userfiles/file/88726805375.pdfIn PDF document text
    • https://cyberbirddog.com/userfiles/files/gaxixoleg.pdfIn PDF document text
    • https://kettosallampolgarsag.net/imagini_ws/32549046311.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/penezopudojudapanuruti.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/digonugupemimu.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/46277469609.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/40458756462.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/gakekogusobepimavafazi.pdfIn PDF document text
    • http://nokianhakkablue.ru/ckfinder/userfiles/files/kutidelolutuvorolabik.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/8840317599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=structural+analysis+hibbeler+9th+solution+pdfPDF 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_off0001a3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3C1 20040 bytes
SHA-256: 78bfa87eb83015ca08353c74427896e4b6387a784a8d5b35dc9b8fa9370f0035

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