Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ece40d52b2b75ab…

MALICIOUS

PDF

87.4 KB Created: 2021-07-26 12:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d4f42271c8071b31a180ba764400b1dc SHA-1: dd3c4caab0c5ddec9aa6ad75b76cbd67cb35d91c SHA-256: 7ece40d52b2b75abe0e38cfd7eb77ce1e099b7a29cc609040d72dbf7cfb1038b
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of these links points towards an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f6dae2a3ed---1929356454.pdf In PDF document text
    • http://skikk.eu/app/webroot/files/userfiles/files/juluvizovinobimepowa.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/29277884191.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/koxubijutemulase.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/46772878997.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/wixibi.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/88836019549.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/4vi1ojidsdopr75md3to6lus82/12755522729.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/tosozivamigavekoragodu.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/17112952144.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/dvhdpa365cch4cs5nmtdipc8in/38082529982.pdfIn PDF document text
    • http://rotarylaspalmas.orgdocumentos/file/72481330030.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2e034bc8d---62168793211.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ae468166b---bazol.pdfIn PDF document text
    • http://aps-mes.com/files/file/jedivagojedokakukum.pdfIn PDF document text
    • http://baybayankaauamo.com/clients/c/c9/c9e0f772d4a556598cfa564a27137582/File/rorese.pdfIn PDF document text
    • http://bclgrouptt.com/userfiles/file/migadunuv.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/37131588756.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074788cde8ef---27400229690.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4833dcb18d---12097260529.pdfIn PDF document text
    • http://k2plusinterior.com/userfiles/66183818548.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a569e2eb8d8---bifefad.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/joniketam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=mitchell+300+pro+parts+diagramPDF 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_off0000ed3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10554 11144 bytes
SHA-256: acb89ecd6ca108de86f0e1f71c89125c2913f0b1f631b95cd466c33190c6c146
font_02_sfnt_off00011f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2D 18476 bytes
SHA-256: a1fbddc3645bf01efee975682ef87cd1758bb1a0e27c84b06fd96a8ebc05bc8a

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