Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee4695d6e79b6f3…

MALICIOUS

PDF

66.4 KB Created: 2021-09-11 18:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b8f2816f4fbd87b05622bf332ddbbd73 SHA-1: f4d8d6f02112532df1dcda5a4a0d1ebb1b4d19eb SHA-256: 0ee4695d6e79b6f3e64b4745df66b0e270cb8ebfa6b49befd52834d8d115176e
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 heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous external URLs suggest a phishing or credential harvesting attempt. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7731

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://skyzoan.com/cake/beta/userfiles/file/1502244021.pdf In PDF document text
    • http://ombs.ru/uploads/files/juvulu.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021090420074373499.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/41050780720.pdfIn PDF document text
    • https://12shio2.com/contents/files/xefutotukelugabifiso.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/nenav.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/xijekem.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/kowikijevuraliwadamoz.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/jogisijazewutoxiwazutaw.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/5451919057.pdfIn PDF document text
    • http://ariogalospspc.lt/userfiles/file/manivabuwelobexun.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161300de36db46---xizeniluzowutegekapamuwid.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/85208654287.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/9849277152.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/49616503322.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/lizat.pdfIn PDF document text
    • http://topmebli.com/content/xuploadimages/file/28891365579.pdfIn PDF document text
    • http://satisfytech.com/ck/upload/files/50845734148.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/39894865738.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/78062283471.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/73811586337.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/jizureniwodela.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=windows+98+simulator+apkPDF 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_off0000c884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC884 11068 bytes
SHA-256: b88a4de9ebec0bdf041ac0c4a734328ad67c1c1810d6f8da646aa35b479456ad
font_01_sfnt_off0000e24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 17148 bytes
SHA-256: 2fd18ff4f4312a35834539d87da1ae92e3e47a98e379b479182311d2c47f5f03

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