Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bbe612ee1dc7b17…

MALICIOUS

PDF

125.3 KB Created: 2021-09-02 22:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 805ce2f726ba89b643d77768af6a10af SHA-1: 34d8f689586ca87ad238d584a197fab1d218f594 SHA-256: 8bbe612ee1dc7b17ee94cae33689a7fa00b8db31111be02c9c92e98b1524c1fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external URIs and links to websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of numerous links suggests a role in directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://infrive.ru/uplcv?utm_term=odyssey+book+1+summary+pdf PDF link annotation
    • http://fecoil.com/userfiles/file/disapovetadawuz.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5d02246e61---29093489578.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7b5aa0b41---fonusekaturiz.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/56005a3fa66a6eeb7c6e904b4847dddc/15710108421.pdfIn PDF document text
    • http://turatabor.hu/media/pasudaxusadimezi.pdfIn PDF document text
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/57797895670.pdfIn PDF document text
    • https://tahitotfalu.hu/ckfinder/userfiles/files/61048237879.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/fujuzegarapevon.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c15fc79ef69---jalojevi.pdfIn PDF document text
    • http://dade666.com/userfiles/202106file/2021061804504970554.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/b351de452950a4f2420c55e46d6d1391/81814743083.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/7381079717.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070cc40ee3e7---67604768330.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acf499a34af---11980795985.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/41773296665.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/fapifibowuniloxusa.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/1kf0r7c0ihfro8kj0a0n0ohp9u/46137890602.pdfIn PDF document text
    • http://kuresi-kaitori.com/upload/content_pic/files/lazotige.pdfIn PDF document text
    • https://petek.biz/resimler/files/6872554501.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/kezivigedukekisu.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/xozureworowaju.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/77978054583.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/b2smpl3garpfkgbb3n5mgc85fs/bilomazelarufa.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f425203e31---11646079031.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/1setvn554spucihdulj618605a/kivefomafefalonibona.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_off00017dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DBB 10840 bytes
SHA-256: c006e414658b9bb8a88a78f9593fb29aabf9753c44e0bd372aea3da939d3c717
font_01_sfnt_off000196a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196A5 21996 bytes
SHA-256: 8413aa2826e152e43b88e1b72c1ed5408b2414942b921aa69e56bbbf4810900a
font_02_sfnt_off0001cf3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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