Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dcba6943d8dac4d…

MALICIOUS

PDF

91.4 KB Created: 2021-06-29 00:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f51cf148a39a16f4c453b192eb7b4392 SHA-1: 7a6e72f162cc6d627fecc372bc91baa395965c78 SHA-256: 4dcba6943d8dac4d66a33869677dc42644e4c93557906f0dc8525743755c11f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous URLs, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://huntic.ru/uplcv?utm_term=pirates+of+the+caribbean+6+tamil+dubbed+movie+download+tamilyogi PDF link annotation
    • https://motacademy.it/file/xopikugolizelonetofubosot.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc3216e8af---saluvurasofebexukibute.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/71172481578.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609496bce7fb4---90877761895.pdfIn PDF document text
    • http://elm3rad.comfile/bigitowar.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160732e5a65822---tofiloj.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/fasilarejiberekugud.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2188d5817---noseki.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/fexekusujakerunuf.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/86816836485.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a5eb2e6a980---13622211343.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/rewatafar.pdfIn PDF document text
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/xowepimaxini.pdfIn PDF document text
    • https://whitesal.com/data/images/file/8542_20210601142121.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/66668346603.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/e61ab969a41fe43e662d4d9c99910a25/71851319270.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c12d201657---48255358118.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/fatujapodi.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/293i57et5qrb0ld203h53l78i6/kilulukutidesukiruwomosa.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/34181b49afacebbbf2a5213ba05e4a52/pasatokedazumuneg.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098879d434cb---liborebuvowalilovi.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/tvt4v7smv18f3rlh5ev8r6a7q4/riponixiw.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e50b4a5ee3---waremi.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/8kjnho0hbbarkl8lhqovomk8l2/83961371247.pdfIn PDF document text
    • 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_off0000fc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7C 11600 bytes
SHA-256: afcb8ab88925da7395ecdbe01cca37436ce40fa9ab3b2d566ee65989face4efc
font_01_sfnt_off000117b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B9 18380 bytes
SHA-256: c8f6806fc0154d0d846ff7221b80b7989b5dd1ef52f87e282d7084469ad16a8d
font_02_sfnt_off00014796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14796 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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