Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4fcf20ea2c8ad1a…

MALICIOUS

PDF

62.5 KB Created: 2021-09-26 03:17:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 76b1ead1789083e746e30dfa50d9d784 SHA-1: 81776c1bada6514a25b236985bf18b70a57b59fe SHA-256: e4fcf20ea2c8ad1aa35cb707d84ac28f5a6ba63d5f46055c10253c102160aa58
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially malicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a strategy to distribute links across disposable hosting, suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3741

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://pixomot.ru/uplcv?utm_term=how+to+get+300+robux PDF link annotation
    • https://workinhotel.com/upload/fckfile/zadifojorulugexe.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/qh35r9fvhjg4tf27oha9cksaqc/32677046917.pdfIn PDF document text
    • https://topconta.ro/userfiles/file/28437856429.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/23236037508.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/wivaje.pdfIn PDF document text
    • http://lactopad.com/uploads/files/33580540535.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/85048534038.pdfIn PDF document text
    • http://thepducphat.com/upload/files/74571443952.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/nemigop.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/gubamijumonuporenugizukaj.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/59215525873.pdfIn PDF document text
    • http://a-daily.jp/app/webroot/contents_img/files/49046243609.pdfIn PDF document text
    • http://mosvag.ru/img/lib/file/71020002862.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/molazufupow.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/97252899793.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/gitegopupafuz.pdfIn PDF document text
    • http://kanizsakran.hu/userfiles/file/difugolubalule.pdfIn PDF document text
    • http://unseretochter.ch/images/file/kodisexeluga.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210902_4EB1E1D352E0019A.pdfIn PDF document text
    • https://familienbilstrup.dk/ckfinder/userfiles/files/konuxapipunojek.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/sotemafebamasu.pdfIn PDF document text
    • http://minhnguyenvn.com/uploads/userfiles/file/tuseminojuduwalimufa.pdfIn PDF document text
    • http://kahasat.cz/data/file/nizinorugan.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/88630981413.pdfIn PDF document text
    • https://hotelite.in/userfiles/file/gavawupanewugilidagoravin.pdfIn PDF document text
    • http://rjt1.org/upload/files/tuxewejesagovugilawaseju.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/nadugadagebu.pdfIn PDF document text
    • 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_off0000b65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65A 10424 bytes
SHA-256: 51ba07ef097590b0a08af9adf997ca89376f7ce091c3214330cd09542efe2054
font_01_sfnt_off0000ce2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2F 17164 bytes
SHA-256: 918d39bcac6e4254375dc4585b82f79359a8e2c6e12266b0bfe439d077159a18

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