Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1cd731e394eb940…

MALICIOUS

PDF

75.7 KB Created: 2021-01-06 09:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f5adb187a1da2223eda335feff1f66bb SHA-1: 71db9b5a532355762305fbd1609c2473bb5d03a0 SHA-256: d1cd731e394eb9408f40195a30939cc3d60d9f8888832df1c06fa9dad9495a0d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to reference 'Kda akali wallpaper', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/aws?utm_term=kda+akali+wallpaper PDF link annotation
    • https://cdn.sqhk.co/mekekomubun/OCjffFd/40256380073.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f872fb573a8e.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/bVgehc7/game_center_apple_id_forgot_password.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383450/normal_5ff41eefcb61f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/24429422893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a0b073-e8b1-4871-b5de-73df95b3eda1/pefixibaxonezalef.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/25188094310.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/how_to_train_your_dragon_2_online_stream.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/antigeno_prostatico_elevado.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/57352110714.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/birthday_wishes_for_brother_whatsapp_status.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/founding_fathers_worksheets_free.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://scripts.sil.org/OFLIn 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_off0000d70c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70C 4900 bytes
SHA-256: eb2e87c6c734cdb1cb61d984e0fdcc4698c1f6415a07163eedf9cc18f3dde88c
font_01_sfnt_off0000e7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D9 11028 bytes
SHA-256: 8cb71ff4361ecfef009607aaf5d7b7c5dc5a96fc877082c876d291ced082a9ee
font_02_sfnt_off00010cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB2 16164 bytes
SHA-256: 4b52fd5da643d9c08cc0a86f773b2f024e3274f3f861dfcac100db1ef433cf06

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