Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea20adbf00c0b4e…

MALICIOUS

PDF

69.5 KB Created: 2021-09-13 23:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: aa7c94b34439238e62e5d027df3419bf SHA-1: ee757e234dcecd29f83c77ac09ab3281b9e2484f SHA-256: dea20adbf00c0b4ed8b29d0b7c2936217ef662ca3e804c99087bdf0f8c2b976a
132 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous URLs suggest the document's purpose is to redirect users to a collection of potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

Heuristics 5

  • 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.
  • 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://cleanking.net/userData/board/file/vuvakigedixub.pdf In PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/pelorarazo.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16136de7ac1705---58638172234.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/wisir.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210906110659.pdfIn PDF document text
    • http://tongshengchem.com/ckfinder/userfiles/files/85373207422.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/52522211504.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/48847659255.pdfIn PDF document text
    • http://www.siposferenc.hu/html/fuzomomuzo.pdfIn PDF document text
    • https://foodthings.us/userfiles/file/48729344885.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/dobaxabifagopujadagofosif.pdfIn PDF document text
    • http://rayer.cn/d/files/wekunobidizixumusozis.pdfIn PDF document text
    • http://www.heksan.com.pl/file/jogerewudis.pdfIn PDF document text
    • http://www.tlo.ntou.edu.tw/ckfinder/userfiles/files/26486572833.pdfIn PDF document text
    • https://www.nstoplana.rs/ckfinder/userfiles/files/pomofonigekuwe.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/rojamuwusafojafigexax.pdfIn PDF document text
    • http://sportgalaktik.sk/userfiles/file/53132482575.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/gasabajepologiruki.pdfIn PDF document text
    • http://guitarenko.fr/img/files/jitopexilodugijofu.pdfIn PDF document text
    • https://appvid.eus/userfiles/files/51745734043.pdfIn PDF document text
    • https://hmradiatoriai.lt/images/files/fojurajokomu.pdfIn PDF document text
    • http://torremaggiore.sitmap.it/files/files/58657260754.pdfIn PDF document text
    • http://factorycontrolprojects.com/userfiles/file/buvunonesalodiduge.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/juzufagam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=eight+letter+words+beginning+with+ePDF 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_off0000ded1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 18192 bytes
SHA-256: 06ab9abecdc11f209b9e074e6b116a96bcce75f3fb9c0458fba662e5493635c1

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