Malicious PDF — malware analysis report

Static analysis result for SHA-256 c72a01964cc7c2fd…

MALICIOUS

PDF

85.2 KB Created: 2021-07-22 14:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 744a94a093b9893ae00648c6fc903443 SHA-1: 925fa4da8bcd1f3de1e3c6d6a2028eddec0ddf51 SHA-256: c72a01964cc7c2fd32e5928c3d84cc589a1d4ca480328838be9afdccf603407d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malicious content delivery mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs point to various compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.clc-engineering.com/siteuploads/editorimg/file/melevuwulifabupojabobasoj.pdf In PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/97d7ac5a4b989482470e1336125ab383/gazelutenepogavajugorakij.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/c79a4587900dc2ed8cd0949f095b1217/53964012709.pdfIn PDF document text
    • http://laser-piskovani.cz/democms/userfiles/file/wimerurujesozudolo.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/74390158542.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160848e0854b0a---42650707137.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/dizujogodofupopadefi.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/51810332834.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ce34c29b7---69646851673.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ed76b2cea---susoxafik.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/4169018056.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/44654345682.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608252a7b404b---tedokexulilajuzilime.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0794339d3---kowutob.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/xajekoj.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160703b5a95789---wosupofobut.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/senidises.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/34c95341829911e14e253937377ae901/54810556145.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/fnemeja3qp73579k27q2va7kt9/niwefanureluses.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/dumosumelenalokowigov.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/64501848603.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/275545865.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/6856118137.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607c26c1a2907---9006491338.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=fall+guys+cracked+multiplayerPDF 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_off0000eaad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAD 10916 bytes
SHA-256: 5b5d694ac058b88a2260822b79c82b83aa12d2e3f6f661f79f8d3cb1d86fd6ee
font_01_sfnt_off000103da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEC 16772 bytes
SHA-256: 3a6690a5ddfac439ae6f95b0434402262aa35bd719a812b1d2d97a7d3cb8bf1f