Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd5680b4234f5b8…

MALICIOUS

PDF

79.0 KB Created: 2021-09-05 11:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0ab03b6f3de61accaec4ad57b697eb5d SHA-1: 0badf36aa3ab0e5a3bb0dccf344255ad3b1ea47a SHA-256: 6dd5680b4234f5b8eb07e2160adffaa07d2dae95cf873212f843ad7b28e6870e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm hosted on multiple compromised websites, suggesting an attempt to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were directly extracted, the structure and heuristic firings indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4456

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://weblative.com/wp-content/plugins/super-forms/uploads/php/files/n7h9goojia9p5qk5r56vpusl4i/kizarizokofuzus.pdf In PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608650fcf3f1d---1051162876.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/80117593289.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/98459944526.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/lefixiwo.pdfIn PDF document text
    • http://nguyenxuanhuong.com/upload/files/zepifejixipudekatuvif.pdfIn PDF document text
    • https://bamor.org/userfiles/file/vuzuremumifixezagutamisop.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/73296667881.pdfIn PDF document text
    • https://lemanssrl.it/file/wirek.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae260a89983---seputiterakowe.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/nobavizusumijunak.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/lebole.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/51413233211.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/65866859340.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/bokijulakil.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/nileworuwanovuzegusopu.pdfIn PDF document text
    • http://scvumaichiramen.com/uploads/files/85591133098.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/a7c14a380263cf1482d6700f67203fe0/dolenufomutu.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c5fa9b2a9a---selufe.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/dkp87oh7r62j1rma9oobon0nnu/kizesenolijimijesuberisa.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/2595490153.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fa53ddb38f8---dujatowuzinimojaruve.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113ab68bd572---41479519969.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/jugexizu.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/laparokoworunujasif.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/40d4f385ecc93ccb25e93ce0e69fa14e/86743599592.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=leica+minilux+manualPDF 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_off000100f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F7 10064 bytes
SHA-256: 15f08365eaf3b6ccf566e7564b33b33923e5e7c0389761c77e553616d2e304f2

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