Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f879315e38de20b…

MALICIOUS

PDF

115.4 KB Created: 2021-09-17 16:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 37f957ef5a500b8ded567681ed091dc4 SHA-1: 3da793f361df0ccffc8652b9a7c8bdd9b304d2f1 SHA-256: 2f879315e38de20b88ade5da01bf6c90364775c080ac8f11ad8bb17db0d475cd
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and external URIs pointing to a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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://larustt.com/upload/ckfinder/files/81429756736.pdf In PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/44794794989.pdfIn PDF document text
    • https://mimpishiodua.com/contents/files/guzovopi.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/83624678468.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/metidozosubedo.pdfIn PDF document text
    • http://keramann.ru/uploads/files/gojegevizuposi.pdfIn PDF document text
    • http://kdsonline.org/userfiles/file/niveperagasujawepi.pdfIn PDF document text
    • https://ebus.myskoolapp.com/FCKeditor/FCKimgUpload/file/xozekalavukifewijanivav.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/ripovevusazofebovatove.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/sidirinaguvizosiwagum.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/52863026012.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210910084520.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/lojidusexe.pdfIn PDF document text
    • https://romalasergroup.com/userfiles/files/64611591544.pdfIn PDF document text
    • http://cissi.it/userfiles/files/81810212439.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/zakexozeboxodifu.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/xegujile.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dizowusafep.pdfIn PDF document text
    • http://mqskin.com/luutru/files/74569346832.pdfIn PDF document text
    • https://kocgrafikavukatwebsitesi.demowebsiteleri.com/upload/files/25595763336.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210914062654.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/xunedefasimulejunufedepad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=gravity+falls+all+episodes+downloadPDF 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_off0001589f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1589F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000170b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170B1 19952 bytes
SHA-256: b4915cade2a7fd47b2ec53b4491ce24bdb5260c8ca45a7967fc3f7507765f329
font_02_sfnt_off0001a52a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A52A 10796 bytes
SHA-256: 8ae23a12ade9e4639e9e7c9ebf0a21d0c1aae278d4a7238c76f566d9490ad8ec

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