Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9de4adffb9c203…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 05:21:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 07b1b648997833b9e3072c91d9a1e8b2 SHA-1: 19d5aed8d5079b0e5e713a2d4514ee6d3a32308c SHA-256: 2c9de4adffb9c2038090fb2fe68d9220bf722a7a2169fef18b3be74f913006b6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to 'netcdn.online', which is flagged as a game hack redirector. The document body, though heavily obfuscated, contains references to 'Roblox Free Robux' and the same malicious URL. This suggests a phishing or scam attempt designed to trick users into visiting a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/roblox-free-robux-website-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-outfits_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_004_off000050cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50CD 25864 bytes
SHA-256: 48075c10ffe0b76e2d2684a49446ad131cbc4666a29e82333fd0384756d9089b
font_01_sfnt_off00008d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2F 18508 bytes
SHA-256: fbcd203c7e924a0ebec4ef4aa0eb55ec8b14d1abcc2767c4f5d3ad1ccc86f8e3

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