Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9f59b8ebd1088f…

MALICIOUS

PDF

82.9 KB Created: 2021-09-14 21:11:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 01cdfba0179eb9c49d71fdb80d8c40b9 SHA-1: 27db418d49bf240cc2bb1e28d93e5e8912318662 SHA-256: fb9f59b8ebd1088f2dd68f7ca812b401eeb3cca67902d0162224e1f0b7fab7ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, suggesting a phishing or credential harvesting attempt. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://chcial.ru/uplcv?utm_term=star+wars+emojis+android PDF link annotation
    • http://saiprogetti.net/userfiles/files/mosanogopopagijatuwegat.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210912044834_fgkgip.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vubumaremeresolefujob.pdfIn PDF document text
    • http://metzlerranch.com/userimages/81609299800.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/717437bd30a927fa2ecf3c4f392f54ea/vumuzoforozilemow.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/buwiwufogotagixaz.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/98f28597616fdb1729c6df6a52dad4d9/90446873630.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/75950555734.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/4922462431.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/wowevo.pdfIn PDF document text
    • http://kp-technik.cz/ckfinder/userfiles/files/92236330505.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/161378ec469be3---dugomazugoxapawelivise.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/foxelurajuxisare.pdfIn PDF document text
    • http://gloteckr.com/upload/editor/file/tuxupavemeb.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16133be40d87dc---bojadesufowujaniti.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcaa602b0b---73579490956.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/51266079305.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/75619734296.pdfIn PDF document text
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/97832949285.pdfIn PDF document text
    • https://vespaclubcagliari.com/userfiles/file/35120921682.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/depezomebozasag.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16140ba01efb5e---vidodibonuwasojitewen.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/fesopupobas.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF544 10652 bytes
SHA-256: c4ccefc1f48a89b672286e82dd3b5a74b6e4dd7b3831dd105f8b5a14aeac7c33
font_02_sfnt_off00010da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA1 18604 bytes
SHA-256: 22ced3a556f6c50986d48e08d84b2d920f0ea72afe9ad14ff082ef76b43c6d7a

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