Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49b169d3be07751…

MALICIOUS

PDF

76.2 KB Created: 2021-09-20 13:16:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8b7e0199a3dc0cc7ea78b31717493dda SHA-1: 1cca3d200503d21d81a56081b002533160732ede SHA-256: d49b169d3be077518e0d95ef370ebaf94d6a48a59e27d46e7a653f0a54015e28
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to external URLs, as suggested by the PDF_URI heuristic, which are part of a link farm on disposable hosting, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7561

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 https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/09257ef6652314a4c4ebc912b9abb27a/vukibijid.pdf In PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090908020173499.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/womavuxowotonitu.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/49781060182.pdfIn PDF document text
    • http://floridadressyourhome.com/uploaded_files/userfiles/files/98361164179.pdfIn PDF document text
    • https://slotpt2.com/contents/files/76178459848.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/71507231496.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/52139693500.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/xigoseteni.pdfIn PDF document text
    • https://middletonchambers.com/ckfinder/userfiles/files/jedomitag.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/30375595912.pdfIn PDF document text
    • https://somogyplusz.hu/files/sokajasujerowaseropewiz.pdfIn PDF document text
    • https://tadimtursu.com/image/files/lifimoliwunapepokebafa.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/28124088793.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/vudud.pdfIn PDF document text
    • http://brickform.cz/obrazky/files/zelatadexejinenaluxavis.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/10452100240.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/xevodu.pdfIn PDF document text
    • http://debeight.net/UserFiles/File/memokalitobidonokife.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/laxafivofugodowugepexarag.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/lisumigesovotafasu.pdfIn PDF document text
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/zarenaxemelujasawewazoli.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/65659274935.pdfIn PDF document text
    • https://htchninc.com/d/files/82513546693.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=emulador+super+nintendo+romsPDF 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_off0000d7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7AF 10636 bytes
SHA-256: aab245d1aa891ef5a808e3a2537e1bf62c858f61cc94476e1fd9aa0da44fc219
font_01_sfnt_off0000efea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEA 20128 bytes
SHA-256: 29c553f5800c7cbdf53acf361c6663a500d1f4ae514ec88223bd227c903fe6e2