Malicious PDF — malware analysis report

Static analysis result for SHA-256 1489b9870fcadbff…

MALICIOUS

PDF

65.1 KB Created: 2021-09-22 21:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f777e6712c4e6f4842fe575d0cfee6f2 SHA-1: d442c816d80103af7e1de964734ad075f67dee64 SHA-256: 1489b9870fcadbff16181be98eb41a05fcb88392a1b21072787f5f66f3ea383e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links pointing to other PDF files hosted on various domains, many of which are identified as potentially compromised or disposable. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery through these linked documents. The presence of multiple external URIs and link farm heuristics supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6089

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 http://kawana.tech/userfiles/file/24790675312.pdf In PDF document text
    • http://ebiocell.com/uploadfile/file///2021090621504952.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/welefixe.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/lizidemaj.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/tojubulozumusajipixuzuvi.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16141fbad687d7---xuterorijodiberasosewexiz.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/87924607733.pdfIn PDF document text
    • https://worldmedglobal.com/userfiles/files/dexax.pdfIn PDF document text
    • https://showdetango.com/bafa/userfiles/file/41043671188.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/72065227805.pdfIn PDF document text
    • http://mfo-fond.ru/ckeditor/ckfinder/userfiles/Images/files/80199317435.pdfIn PDF document text
    • http://2013.letnifestiwal.pl/ckfinder/userfiles/files/zotor.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/79028798869.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/21692411117.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/69671560616.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/penet.pdfIn PDF document text
    • http://haohanlegend.com/Uploadfiles/files/73198677232.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613035611914a---fuvatelifawazepega.pdfIn PDF document text
    • http://dvif.fr/userfiles/file/xumiputufoxaxoburifiwoxaz.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/wobagevejafadivaxo.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/terovugibozivowivut.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/paxeropovogipeva.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/62849221522.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/gerewuso.pdfIn PDF document text
    • http://pluimveebeurs.com/userfiles/file/12335743703.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/87782178853.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec5995cfea---nazalajulevaridamulo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+recover+deleted+snapchat+messages+without+computerPDF 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_off0000d7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF2 11204 bytes
SHA-256: 60603cb894652a21da338f7adf609274826954e9ca939d05de78db31fb009154