Malicious PDF — malware analysis report

Static analysis result for SHA-256 e547c64f15eee682…

MALICIOUS

PDF

87.5 KB Created: 2021-09-07 04:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ffdcfc2448369a455ffcb46dca8566b2 SHA-1: 13b50e7b4c111d2e94f80c35b638c7bc00e858bb SHA-256: e547c64f15eee6823d2ec10c1f7aec858c7ac77c4c03cea67fbd3cd0ac8e9ac3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with many embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The primary attack pattern observed is the use of malicious links to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://lingeriedediva.com/UploadFile/file/2021082523074773499.pdf In PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/b14b781277b7bbfa96a1d9a5c1155ce0/81275927827.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/0a4c01cb092dd361255d0f9324fe3aaa/43110546053.pdfIn PDF document text
    • http://wchs67.com/clients/f/fd/fd50fd9748f3592dabdfdad26f378f15/File/92786236266.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/76070129245.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/2edfktp04j6kss8r60ml5rauro/kenonanin.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/dilulamidaxejudawajenila.pdfIn PDF document text
    • http://quetthe.com/upload/files/97892388597.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/bafalode.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/lc5lo03rq8k743r9ma4ghoqt94/bezanupinamupakoxez.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//73140595833.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/sujisemitejowamufozef.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/71c66b1b9c2cbb4570fecfe4f48c77d1/jalugakifobup.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/61fb658f88a715aec28663d841389b69/99582580777.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/cc147cdad1a03ee5f6f5f32c70e8b064/tadebiwapulezab.pdfIn PDF document text
    • https://jcmimoveis.com/userfiles/file/pabisefalip.pdfIn PDF document text
    • https://pindimana.in/uploads/file/gabakamugu.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071469f89b66---pakixuvegikijulafoz.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/xuwutabubekomitexerunutor.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/logosa.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/poximenixozagorulavizefe.pdfIn PDF document text
    • http://parquessolaresdenavarra.com/userfiles/files/39948228710.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/76009715909.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=gurucharitra+36+adhyay+in+marathi+pdfPDF 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_off0000e2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E0 11012 bytes
SHA-256: 17b44f17990f7ea4acba4dd71c3ecd4ad4faa34c84c8ce6a48308df08054f1b8
font_01_sfnt_off0000fc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC54 23244 bytes
SHA-256: d3a65e7aacab483ed9ba9d9d519ded8e4fe45ed23ab08692acb10c7e953a4f8e
font_02_sfnt_off000137b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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