Malicious PDF — malware analysis report

Static analysis result for SHA-256 3422d0d747e03495…

MALICIOUS

PDF

81.9 KB Created: 2021-08-09 03:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c5cd91ab9acaa66dd4c97022d5b108e6 SHA-1: 811fb4272132a837f2e59cf75aeeddf2b4fa87e2 SHA-256: 3422d0d747e034951aaa179ea8639e2bd4341572e824e63f690da66a7d1b5dd0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are typical of malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=la+era+de+hielo+3+pel%C3%ADcula+completa PDF link annotation
    • https://sieuviet.net/webroot/img/files/71971320140.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a95f27264d5---vodefawirasazewij.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783603addf0---gekise.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607802c0c46c7---69812705393.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a88d497374f---sepawixanotaba.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/vusijuwarim.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f65625a71b3---kamidezexesosufofuxejasoz.pdfIn PDF document text
    • http://weclassof86.com/clients/6/6d/6dc59c75684a9be5e3a4726337e2fa3a/File/58137425472.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/6b42bc6c5c92cbf7e5543921086b4a43/170788370.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7cd259383---lasogodobejomafawegaxidi.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/wedakisigoz.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee276903b07---74165893250.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16093f6799b42e---sexelurapokuzapifutowam.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/81466825354.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/b4825b720721538f79a9e24c7f48c14f/lufuxipovabuge.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/72851065178.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/4513133858.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/43660498614.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b290a103975---21974061195.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/sig4pfejikk55qo4ci2k3vifi5/51556988217.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/vuguxujaleroxasib.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/kiwudatowulone.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/e676a508a94c5c3711bc161d72a95dd2/26342858810.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/19296915741.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/48592061dc62afa26d776a315ff4047d/nuvujuje.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/f2d836b3bf3b2b4bd48a9812f258669b/fubanogosafotugonud.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_off0000d942.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD942 17888 bytes
SHA-256: e5f836b2b126460d59153a1e89b0084ac0ef1ab4d6842652399cd417d1d2cdb9
font_01_sfnt_off00010720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10720 10800 bytes
SHA-256: e9af48694e05f1b47ac39ebc15570033e1b1b35bb36eaf0334597e2669dcef18
font_02_sfnt_off00011ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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