Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a098e9b2e33762…

MALICIOUS

PDF

63.7 KB Created: 2021-09-27 13:20:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 950c5440261050551e6b933b3d5ab258 SHA-1: 820f5bc10d0943b5601afd26beeddefd8a360c6e SHA-256: 69a098e9b2e33762623064e88a7f0ed092cf18ceb4739fea6d5f8c97c6ebae15
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS uploads or disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware delivery through these links. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6700

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://smidgel.ru/uplcv?utm_term=kamasutra+vatsyayana+pdf PDF link annotation
    • https://elger.cz/fckphotos/file/robanitamelowelafegev.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/tujejibuwizepu.pdfIn PDF document text
    • http://dautuck.com/uploads/userfiles/file/xelurolisixamofebur.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/27895352968.pdfIn PDF document text
    • http://artepcb.com/upload/files/1432982814.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/62790253193.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/491086346.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614e24c140432---1896311143.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/senisule.pdfIn PDF document text
    • https://www.znackakvality.info/files/52634499730.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/joporazigekexelofi.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/fezovarasul.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149dbb2907c0---zatodugot.pdfIn PDF document text
    • http://kezmosas.hu/files/file/30946524784.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141f9f675ef3---lurolagaxepezitetixurosu.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/39723976023.pdfIn PDF document text
    • http://z-him.ru/userfiles/file/dewimefuwubaxax.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/pexedujivirizupum.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/76713667089.pdfIn PDF document text
    • https://parc-hotel.info/file/50503541579.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/79058937921.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/qmpknpt9ted8ituopnkcdhe2tu/95252092747.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613850d10b98c---35027788253.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/favalew.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/likigolamoxu.pdfIn PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/polapojuranavizu.pdfIn PDF document text
    • 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_off0000c451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC451 18412 bytes
SHA-256: 38a0bfdaabf418c3dfe4f56d3e67665a3b452b9739fb320da82c8cef9a084441

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