Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b8df6001289b1b4…

MALICIOUS

PDF

73.3 KB Created: 2021-09-17 08:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 308769695ac6bef70b3ca512f4906afd SHA-1: 033fe62eb38af914bd148d9de27fa340dba8d84b SHA-256: 5b8df6001289b1b4671cf7864b61e30c549955b08aad0c4ed5e62beb950e7a2e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this is a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://crewmak.ru/uplcv?utm_term=parkour+craft+mod+apk PDF link annotation
    • http://www.ferm-matic.fr/upload/file/63698499652.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/58887525059.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/45697647903.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/27872541503.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd1b303316---73108442818.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/58115648748.pdfIn PDF document text
    • http://regcureguide.com/files/files/leguvopebekuva.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/161413b9ae1f65---93228061126.pdfIn PDF document text
    • http://ocvitlucky.com/vietkiendo/upload/file/37072585681.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/24837405733.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/21853101197.pdfIn PDF document text
    • http://kondicionery-elektrostal.ru/upload_picture/file/budikapuxidetojegaguf.pdfIn PDF document text
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/13998080759.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/vuduxopiwevixafu.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/542688fb46de8f8003e13cfd351a3796/lepizevodowenegodipeno.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/73189921630.pdfIn PDF document text
    • http://cualuoiskydoor.com/webroot/img/files/76335899899.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/83340953546.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/83045456107.pdfIn PDF document text
    • http://erpos.sk/data/files/94869936797.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/89044219091.pdfIn PDF document text
    • http://forti.in/userfiles/file/54776124416.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/zazijuwakagefeg.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/97602772836.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_off0000bd4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD4C 16260 bytes
SHA-256: a752ffe6584af6afaea00d876e5a7d8141152517ada4ed3266f118a242c6d818
font_01_sfnt_off0000e7c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C1 10432 bytes
SHA-256: 837166289f7249b4892a553c7545d5fd2252034bae60b5d504f65efeace31ccc
font_02_sfnt_off0000ff80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1