Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca64c14e63c8385…

MALICIOUS

PDF

124.1 KB Created: 2021-07-02 15:21:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c4f61420bc76b4bd5c45d0e28e9a1742 SHA-1: c2b146828ed2491ec8f36072436f50db92ef38bb SHA-256: cca64c14e63c8385aa5acd7cb8d506cdd403ee0f2e512f800e6748bf37d1ab75
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to distribute malicious content or engage in SEO manipulation. While no scripts were explicitly extracted, the nature of the links and the PDF structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d2038b060---85555783488.pdf In PDF document text
    • http://provia-events.de/pics/fotos/1/file/ziwatu.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/34d299be68e28a79319c844887e7a4c4/lagegawixubago.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/ranejefawagidogefazoj.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/be8096193fe2202e0cdaa2a04001ba68/tuzujituredexoku.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/vajejarum.pdfIn PDF document text
    • http://wjvanderheidedienstverlening.nl/uploads/file/11041013402.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/mamap.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/b648737f7da8f9fc1f162e629288f305/lopalixe.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dea2c100b39---80455594099.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce1af42281---gipexuwararaz.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/04304ee6f7a28280dcc60f6223a8d5a4/15069162521.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210603_113308.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16091fb955e0a0---wofetixurugidewabezuk.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/iq6esj71kbilm1qu1c74rd42s9/kidodi.pdfIn PDF document text
    • http://cjatkinson.com/userimages/wajemijot.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607417de84258---71106618412.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/29720080577.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/watuxowem.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da88550b17---92424364540.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16086d06bb0e6b---tolisefozi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=brother+printer+mfc+420cn+manualPDF link annotation
    • 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_off00017e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000196a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196A6 11052 bytes
SHA-256: 0110bbac2b8dd1fea88fc8593075196416915ec897fb4a49111c7e9654d6a20f
font_02_sfnt_off0001b040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B040 19368 bytes
SHA-256: 06e00ba165c9c9df3eecd0391025c0682b9050e209605d8fa845675bdca8f694

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