Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c573f65773d63ec…

MALICIOUS

PDF

69.5 KB Created: 2021-09-12 00:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8965639e8f6f72e228634197e73eb0cd SHA-1: 9c83abbfabbfbde60fc2e2c3a70c3089585b5040 SHA-256: 6c573f65773d63ecbd579d0f8866e8a61af2b5b7abb63f949c56b9c5b7eab525
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature, suggesting it's used to lure victims or deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6930

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.
  • 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://smidgel.ru/uplcv?utm_term=croods+2+movie+online PDF link annotation
    • http://nanchang.chinatupai.com/web/js/ckfinder/userfiles/files/defulamukide.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/12570853305.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/limepopiv.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/rofemapovigijegazinogasuv.pdfIn PDF document text
    • https://miltonmattox.com/userfiles/file/zotuvefosof.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/vilumo.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/tazawewujenanejex.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/zusujide.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c7c2e14d5---54680772960.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/161352fa55caa1---25668950394.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/39885749841.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/modotudokevukobopof.pdfIn PDF document text
    • http://suspensionestg.mx/userfiles/file/51610780047.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/84499054833.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/39346581778.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/xiloxalonopemoni.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/97425046119.pdfIn PDF document text
    • http://www.nachtruhe.info/up/files/nivozoxekovadosaxa.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/93842511706.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/72074430867.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/judolapisibamunatevevubul.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021090602052695.pdfIn PDF document text
    • https://pakistanchristiancongress.org/userfiles/file/wolob.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16133033a09c4b---lajizosabapumapali.pdfIn PDF document text
    • 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_off0000d475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD475 10368 bytes
SHA-256: 5d692a1bc8c7e87569094af4a6ec1ea83ec91b200a3feef5b4e2a65a055ab70f
font_01_sfnt_off0000ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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