Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ce39d0208e3d59…

MALICIOUS

PDF

84.8 KB Created: 2021-09-16 07:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d4c0ca684b1e563f2a19368a54cab122 SHA-1: 8dfe08dbf58693b774b4b3812a15642c6ad50d7d SHA-256: 69ce39d0208e3d592eac0780a82829cc72fe9185c0a8a2aea6fa8c53d98325f8
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external links, many pointing to disposable hosting or compromised WordPress sites, suggesting a link farm designed to redirect users. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://autoteam.in/ckfinder/userfiles/files/55998660540.pdf In PDF document text
    • https://www.thaiahpa.com/flash/files/savogawako.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/tatiwidedirovirinubelareg.pdfIn PDF document text
    • http://dezis.ru/uploads/files/zevikonukaxudiwogajizigu.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45269799528.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/42880329780.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/80380969258.pdfIn PDF document text
    • http://szyoujin.com/UploadFile/file/20210909183316054.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/14711555002.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4dff10150---54032207049.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/rokefolibusebekeriwinob.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/bdc04513923d85dd359d20c63f5b0ad8/3931822306.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/41814496139.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ce154h2plbumg8gpo0frg4ndbq/jabozigubenofed.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/6596253375.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/95104565404.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/pomazakewuguzuruporovubo.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/76626776925.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/gomopekivuperozuzonevu.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/xurifefifodutafomel.pdfIn PDF document text
    • http://topbuild.net/content/xuploadimages/file/jirowipunijazan.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/86506111254.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/guzegatoxemafu.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/161395fa1dd150---xevikufezelerofekokewo.pdfIn PDF document text
    • http://longbienco.com/js/ckfinder/userfiles/files/buseritaxelovu.pdfIn PDF document text
    • https://asi-filter.pl/files/file/30745603355.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=procesador+de+texto+para+tablet+androidPDF 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_off0000e514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE514 18360 bytes
SHA-256: 5e36cdef6c4bd30b5d930a7ed5ab9793069f983b8e54c3f79f458ea67ef703f6
font_01_sfnt_off00011418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11418 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2F 10748 bytes
SHA-256: 028d52f2ffe59fcde1a73eaf988c6263581143e2e9159e49f1a69724569ac85a

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