Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74e99cf74930d72…

MALICIOUS

PDF

73.7 KB Created: 2021-09-22 20:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e1deb76983eafd6585343ea858a71558 SHA-1: 9d0634973f40b9dae68323e7eb469e54d47b4b61 SHA-256: e74e99cf74930d72af72f8b1c9117ac126f07e6fbc5061cb37b241dc7a8bce26
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document attempts to trick the user into installing a malicious browser extension or update. The embedded JavaScript likely facilitates this social engineering tactic, potentially by displaying a fake installation prompt or redirecting the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://archism.ru/uplcv?utm_term=esperanza+rising+ebook+free PDF link annotation
    • http://www.serge-valentin.net/ckfinder/userfiles/files/73382962902.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/82102391006.pdfIn PDF document text
    • http://opgzvh.hr/upload/file/mazezilofowodumobage.pdfIn PDF document text
    • http://ambulatorioveterinarioilprato.eu/userfiles/files/beguj.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/66598572355.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/32993266914.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/poxutegitarox.pdfIn PDF document text
    • https://satbietthu.com/luutru/files/1747486910.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/46411147827.pdfIn PDF document text
    • http://globalsublimation.net/uploadfile/files/9384522868.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/8b6a9c4d6f3c150b90ce2e1103f5e597/kagexuwefumun.pdfIn PDF document text
    • http://wib24-admin.de/uploads/file/nukake.pdfIn PDF document text
    • https://indiantiffin4me.com/nbloom/fckuploads/file/poxijasawejevozexufaxunar.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7ed781bcf---zaxonevul.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/f5accb7a9c261f56acdd849af882ba4d/94324292842.pdfIn PDF document text
    • https://ladachess.ru/userfiles/file/65341749646.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/97626977832.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210909055403_ngcfua.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/wakogobujixazil.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210901221023.pdfIn PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/27996977066.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16136eacde79f8---rigofukazenowozolixiv.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/gufegivupefo.pdfIn PDF document text
    • http://koreaticketland.com/userfile/file/45144421562.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/45121625062.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qlupq25t6mme0u55u8vd7unfs7/36879061058.pdfIn PDF document text
    • http://ccsl.asia/files/gilokineninenenaj.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143f57a01973---79916303424.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_off0000bc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD468 10664 bytes
SHA-256: 153c6e338a4b6c040387a0c4b5a3f82b03b0a60e4560d62d97582421d6fad0ab
font_02_sfnt_off0000ecc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 16900 bytes
SHA-256: 1cbf5e91529300afc1612c5432e914176325aa0d32176d9f0fedb6e7a15a7c7b

Open this report in the interactive analyzer, or submit your own file for analysis.