Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8ac24e44b432bc…

MALICIOUS

PDF

73.4 KB Created: 2021-09-09 05:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: acfd3bded2bc8e60cae5de2e6f25335e SHA-1: a9c39d7370a22fd3a3f8e26af85bb89bd3926c0e SHA-256: ea8ac24e44b432bc06c8146c534bd66a026a743ce078f57b9ba5fdac409619b1
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8161

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://bigcool.net/webroot/img/files/vejexosidakajodesoroguna.pdf In PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/46056689626.pdfIn PDF document text
    • http://pnalog.ru/images/file/vajidifo.pdfIn PDF document text
    • https://reklama71.ru/upload_picture/zetaw.pdfIn PDF document text
    • http://hueide.com/upload/files/46810205292.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/wenomibogubufividanasaz.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f741754a98f4cfe68f6ab6b7a9cb7260/lufusejet.pdfIn PDF document text
    • https://bunexim.dascalita.ro/app/webroot/files/userfiles/files/60305998847.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/69107032736.pdfIn PDF document text
    • http://vietdubai.com/userfiles/file/vosumuz.pdfIn PDF document text
    • http://a-b-i-s.net/layout/bilder/file/72161203543.pdfIn PDF document text
    • https://andhimazhai.com/images/files/lazazefida.pdfIn PDF document text
    • https://veterinarycarefoundation.org/userfiles/file/bobefipawozosedivetuzit.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/rijejinanijusove.pdfIn PDF document text
    • http://koddous.com/userfiles/file/67225378704.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/04/file/lafovufibobifigavilajudu.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/19037678178.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/cs1g1mldptua26hgh2k846ev5j/ragigiwigifowakugimowam.pdfIn PDF document text
    • http://yeosingol.com/FileData/ckfinder/files/20210907_C4B69473AC2142B8.pdfIn PDF document text
    • http://daieimotors.com/js/upload/files/rezajolije.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/58238232335.pdfIn PDF document text
    • http://farmina.ru/uploads/files/ruxadupapaxavezuja.pdfIn PDF document text
    • http://ud2-140.com/files/63760267858.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/67622674070.pdfIn PDF document text
    • http://nuuts.mn/uploads/assets/zarunotiditigev.pdfIn PDF document text
    • https://biharlokmanch.org/userfiles/file/fewomajixifoviwo.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/95626706159.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=new+malayalam+movies+2021+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6C 18812 bytes
SHA-256: 91d5e3dd23c811c26786d960eb4cb6482802c2e76122061a351d33bc5a83e968
font_01_sfnt_off0000eeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB6 10748 bytes
SHA-256: 6349029cebd55cecdd5a47fce3b98276a2ec48df7b270b4de6efee569dec8ec0
font_02_sfnt_off0001078b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F98 1760 bytes
SHA-256: 5fff00743cbca99111c2a7ac28d1b3d5d8f2da3a717fbbef75202c4a137a6772

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