Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bbcadfcccd90cc…

MALICIOUS

PDF

110.2 KB Created: 2021-06-27 20:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6a04cedad52d75d1f4297cc84c864a79 SHA-1: 5b3f853c66364ee229559a9fc2f8b22ab25af4d5 SHA-256: 08bbcadfcccd90cce0f89e20c8af081c4a0ab6a5f706ecae7eea6ace7f75aa60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous links to compromised websites, many of which host other PDF files, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users into downloading further malware or engaging in phishing activities. The primary attack pattern involves directing users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ac06a9cde---gulidafedotovebenizojog.pdf In PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/9bbb6dd07724c1b2da2a9ad52b4ed342/jonofikarixusezenijudeti.pdfIn PDF document text
    • http://olneyjune65.com/clients/d/dc/dcef5d22f85ec69f5810ba62c2e8cf46/File/3276435793.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/1722317b5ad808ffc1eb19bacb85802e/4300232561.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/k5oar82icsp9ak1hpj231gktcc/tosuborex.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079828504f0f---72678633025.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe56330c26---zovonusilodelifomofumokug.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/5iehlimc35ijbbssarosjsejt2/30727076775.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/hjg0j9cg6441fevugb0a0i6rdq/kusijatuvukepenuw.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/30361359569.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0c37951c7---soxenovo.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/0eab09ebfe3bca2b0bed9d0c5734e586/fibufaka.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/raxibitaxawowodegar.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8585032992---65907129193.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0c435392e---nezilevemigimevage.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/jleq7t2d2a0flb52v3f8aiktr2/wezomapu.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160928666ac35c---14393565956.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/petesutowifer.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/54524913435.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f5a86dcc302011fd6156f2e8b4cf7685/95050577480.pdfIn PDF document text
    • http://alkanboya.com/files/file///70736486164.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073f3d238658---47239600994.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ih8qnhnur5j3luhc0kgam3cbpe/ruratekigopifovovanomozi.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/22525477920.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/34105671042.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=foul+and+fowlPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001162f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162F 20168 bytes
SHA-256: bb0f333f02dec82bfccd1c35896565931ba048655f1afbb557df5641083c2db1
font_01_sfnt_off000138c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000150da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150DA 23564 bytes
SHA-256: c724f8638e9a5b26515c6ce25e28011a6956635a8987ca906dc0f7033cb366e5
font_03_sfnt_off00018aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AA8 9920 bytes
SHA-256: 816abc286f1a28b9fd67dc3e7bfdb94707cf1711b03e787f43b0bba0cf2aabeb
font_04_sfnt_off0001a0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0A5 2188 bytes
SHA-256: c6e1277c52ee3d970c503028ae8a1c60b3a8544d0d81a7e31f03a8ce9d0ad393

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