Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd22b33b10a3de2f…

MALICIOUS

PDF

76.3 KB Created: 2021-09-18 01:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 41edf5c224975cec5fbbe6049a50242f SHA-1: 356615a70e8a4f6efe5891b61ac056bd1c9d6560 SHA-256: bd22b33b10a3de2f43e6fee5a953e52ac8f227d153ffd5fe988bad02c1c56fab
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to disposable domains. 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 executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://smidgel.ru/uplcv?utm_term=nach+meri+rani+rani+song+download+apk+mp3 PDF link annotation
    • http://cecev.com/stockages/files/potuxeda.pdfIn PDF document text
    • http://neapol-m.ru/usr/file/94437219809.pdfIn PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/87529914341.pdfIn PDF document text
    • https://ip-kamera-rendszer.nuttydog.hu/ckfinder/userfiles/files/84606390222.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210914_002837.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/94204974216.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614012a1d346f---56226959652.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/jagezumafowugekojug.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/79364511128.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/57566000260.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/lagunipufutafobuvelanafe.pdfIn PDF document text
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/88957438690.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/54274443344.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613386f35698f---35449052156.pdfIn PDF document text
    • http://drigungkagyurinchenpalbarling.org/upload/userfiles/files/xotisowejusugodapedodepo.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/sujilirarawida.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/94738645114.pdfIn PDF document text
    • https://www.thc.gda.pl/ckfinder/userfiles/files/27678936138.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_off0000be99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AB 20064 bytes
SHA-256: d041f2e1e7909135e9a2a35f7ef25725662896102f127eb4d590ba703453b429
font_02_sfnt_off000109e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E6 11192 bytes
SHA-256: 6e819c3576ac0bf4e9a18186d1d9b8a2d37708652c594007112809385257477e

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