Malicious PDF — malware analysis report

Static analysis result for SHA-256 0269b9fa5f862f25…

MALICIOUS

PDF

92.1 KB Created: 2021-06-10 01:12:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76e03ebe76e3609e00cd9ed7fc013d21 SHA-1: 57f0f9298dad588669fe9c2d427af5314419efe0 SHA-256: 0269b9fa5f862f254c52a4aace69ac9e31e010a221793afc116a67e8f1de4e51
164 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content, potentially for downloading malware. The presence of a download button lure further supports this phishing-like attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crysiq.ru/uplcv?utm_term=download+gta+san+andreas+obb+apk
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16077e34743942---50252306199.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f12105b170---7663699367.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/h6dlal6eln8ciktl276prutpe4/lokiwujobamibirova.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc44e8dbd2---vonojorixof.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb711e99cb---zovemubedivodara.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160966dd299e46---52654318663.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/6eacb6b64ba736ff033cf37cc07e4bff/levixilisefenezuxu.pdf
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608468a5161c8---84301448699.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/1kf06sjcrd92fd9ndgphkqna21/48461166658.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/479e14a71cffded5e799f0ae75f42814/2816959216.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/e8207ddd4ab8adf190a422e8b80a4847/79039765199.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a559dc9e582---xinisilu.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/11f18f7f0a8833fe6c2e91c5523fa1f4/37002868771.pdf
    • http://www.multigacos.com/admin/uploaded/fck/file/80886652925.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/25sf8f1llfkkgtj4njua4jlc46/nutilomulubifi.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086053be880a---ruxukokegoxoxizunefe.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088d31f21424---foleb.pdf
    • http://kotolantopeni.cz/file/viwavefirigajibu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001079f.bin
7a5b0a05e987187951f09f984fddda068a8e1e4735a2a70bf75253af9157563c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1079F 5160 bytes
font_01_sfnt_off00011947.bin
ec6d258e61d4dd33cb28fe8628f9553da55886cc72ab8b9d9c0302909654ffa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11947 11244 bytes
font_02_sfnt_off00013fc2.bin
764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC2 16144 bytes
font_03_sfnt_off000154c3.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154C3 4324 bytes

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