Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada9ffcc124a8ab3…

MALICIOUS

PDF

85.8 KB Created: 2021-08-23 12:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 5773403377813740a00afab4eb3a8c28 SHA-1: 6332a3d5f06a22990e895cb3aaec177f67487c23 SHA-256: ada9ffcc124a8ab3c76766e7a7baf41f6a023411f7b87c6601fddc666eb6c06b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The file functions as a link farm, containing numerous URLs pointing to external websites, some of which are hosted on compromised WordPress installations or disposable domains. These links are likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://pistant.ru/uplcv?utm_term=lave+and+wenger+situated+learning+pdf PDF link annotation
    • http://interel-rus.ru/test/sites/default/files/file/denefetobipeve.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26f3be5bdb---kanalonupuwapudozuforabe.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/topor.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/wixasenawalatim.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/83524174005.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081f3ef2aebe---tesisibunow.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9b8ef133a---zubunafutobonixesuxelu.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/b43debecdc60b6b2b3737831b986ed78/67266913812.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/tivase.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/43393557541.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/45595007376.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1611b34e585ad2---pibubomokapupuwofamudele.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075faf7e34fd---gowuritixitolasolulawuri.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/d3fae8ced19e1de7ddb0e5ec1306794d/nijafaxuxel.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/bujefu.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/lefelekosufowid.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/suvegoxipegexamifijelu.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021081520585746.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/37093362143.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/76556936081.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/61817320239.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/04ffef0a9d1889cadc7014da5595ac24/sowerulaliximuwoxirule.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bc0a851ad3---29226941770.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_off0000e52b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52B 10764 bytes
SHA-256: 24796e7adb927e2c24532f0433f62e8eef53a03699b7c6807a2f96290d7e5024
font_01_sfnt_off0000fde0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE0 19112 bytes
SHA-256: 586311367b5ea09bc25dfa8bf8d054bbc05474013c21a87a3a83274f2bf81220
font_02_sfnt_off00012ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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