Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dd0ba76332df5a6…

MALICIOUS

PDF

41.7 KB Created: 2021-05-21 15:03:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d2d0b387cdf2a61d6dc39aa879126c08 SHA-1: 8900ddcd49c90c244f45fa8d5ae1867b47beef55 SHA-256: 9dd0ba76332df5a6576c8ca28f95162cfb69cc38e671c0afd5238fd0d8c5c8f0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7580

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://netcdn.xyz/app/431946152/free-robux-codes-no-verification-2021-game-hack PDF link annotation
    • http://teknotools.net/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://teknotools.net/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://teknotools.net/images/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://teknotools.net/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://teknotools.net/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E5 29664 bytes
SHA-256: d6657a8bbdeac9e0fca0b6382596b111398f9b9327c5f0bbe5960a3e895c437b
font_01_sfnt_off00007487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7487 2984 bytes
SHA-256: 889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc
font_02_sfnt_off00007eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB2 19176 bytes
SHA-256: db1e34f64d78c47646929d75ef8e7d82dfccacc985d29653851fea35b3c0bf96

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