Malicious PDF — malware analysis report

Static analysis result for SHA-256 c704d1466e60ad3f…

MALICIOUS

PDF

45.2 KB Created: 2021-05-11 06:34:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: be253683aaae6bacbcd922bc4471bc7a SHA-1: 67a868e86bca8a313327ec837d2e37f3c75a5712 SHA-256: c704d1466e60ad3f0efb88065d79df93376e3efcce532a4e92f3cdb5bf6744ec
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-risk heuristic indicating it links to a 'free generator / game hack' lure, specifically pointing to the URL https://netcdn.xyz/app/431946152/free-robux-without-survey-game-hack. The document body, though heavily obfuscated, contains references to 'Free Robux' and the same URL, reinforcing the lure. The presence of embedded PDF streams suggests potential for further malicious activity, such as JavaScript execution or payload delivery, though no specific script was extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-without-survey-game-hack PDF link annotation
    • http://gts.edu.gh/library/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004851.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4851 31168 bytes
SHA-256: 0a47743620a1a692db1ea5621645f4502c9fe9e52f68d9292f4403f3afbf4371
font_01_sfnt_off00008cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB6 18896 bytes
SHA-256: b0c1a7c96aa264be318e1ab456a0b915a72e0bc05fcf36e1ad74b726c9d43bb5

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