Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22ce087b8629e6d…

MALICIOUS

PDF

74.8 KB Created: 2021-06-09 23:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 138b6855409029bd4a98e93a4959f3eb SHA-1: f5480b4b7c1005d348ec129da44087b5646a8295 SHA-256: f22ce087b8629e6da3e1b34af944fbdbfff258a1477e41da4122aadaaa99c09d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, some of which appear to be compromised CMS uploads, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the attack pattern of luring users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=vidmate+app+mp3+song+download
    • http://ferramentabelleggia.it/public/file/zobinazi.pdf
    • http://mytmbc.org/fckimage/file/dobitugegibodatizoxo.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/1bdd10ca25031ec43c6ed4f32a07cc9b/nuferakogosojuzoge.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fffd6a71b---85431013886.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/67mirevao4e88omvjlh23lqhuj/tagukaxogukapawedefab.pdf
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/ab3ltftilc5n8flru0q3i67hk5/78666451325.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/umlp2mkadpjani0ltelcan7dj6/31000064220.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b361673f3---tudupigobirom.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609054201b04f---fipozid.pdf
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/1bab93bd53f2b6f4dcffd4862c52513f/konovureliperekiboxujoko.pdf
    • http://afghansolar.com/userfiles/file/solujiruzuro.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ca45b683e---zepatot.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607abde91d58c---zepudifemopolojog.pdf
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093f64985bf0---2202281465.pdf
    • https://anakmeong.com/contents//files/kezewegawixexamabo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f1.bin
857d4ff26aa439f50db93bcca154552950e60988296f6fb72ab31c2983ef1ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F1 5404 bytes
font_01_sfnt_off0000f856.bin
54b7d47b2db040d8ddda24e76015eb5f214781ea3848f36d36ea7bff04ef50d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF856 11264 bytes

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