Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbda6f0e77d85c8e…

MALICIOUS

PDF

71.8 KB Created: 2021-09-02 13:43:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f1953f2598e67d4a49303cf2609d8da9 SHA-1: 9025946de72dcd54dcf73a279277334c51a97563 SHA-256: bbda6f0e77d85c8ef63fd6fbda26768291abc88fe2b486ba084bfe154020e5e2
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised CMS upload storage, suggesting an attempt to distribute malicious content or phish users. The presence of multiple external URIs and a link farm structure indicates a likely intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/13c788638b5d1cd7dda11389ab7bfc34/29869220381.pdf In PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a72d13baed4---zagon.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/36b9be45c9931e0e88dbaea4ea5bf2a5/zazif.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/zunaruxipejuwugelatufetop.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/161000ea4d0470---jefakamogezos.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/vuketunulurex.pdfIn PDF document text
    • https://stpeterscbs.ca/ckfinder/userfiles/files/dajelujoridabilowunojujez.pdfIn PDF document text
    • http://bulmarconsult.com/files/bifotipejuka.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/16abb4f46f97b094fa0b39fc8bba78c4/zekutaroral.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb601823e2---pedixepazazugoxez.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/92950811613.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/44654034472.pdfIn PDF document text
    • https://songhong.info/userfiles/file/61271732000.pdfIn PDF document text
    • http://yonezawanet.jp/units/24250/zcycom/files/semupukemodurizora.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab33a5471---89946717652.pdfIn PDF document text
    • http://www.lasallelille.com/admin/ckfinder/userfiles/files/kobavapoko.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16097d44c14aab---43247841041.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d882dc033cd---23773956476.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/84393794202.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/15161719343.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d0f50b951---bijomagowomomo.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/pufemerutumimufupafo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=jai+jagdish+hare+lyrics+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_off0000b8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BA 10812 bytes
SHA-256: 6cc0ce8469d5d99a2977d916d679e97bfd4a73ae7867d1843f3a3de996b71059
font_02_sfnt_off0000e981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE981 15820 bytes
SHA-256: 630fa7b0b793f580b2ebc077adb9e37e63f6affec3b6bf4590312c44c31c53b8

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