Malicious PDF — malware analysis report

Static analysis result for SHA-256 42ffccf36556ef0c…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 14:44:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 48c0007d6174ac826ac14d5e1b8f95d3 SHA-1: fcc6adbd552ce89040aac332490cde62ec7bc9f5 SHA-256: 42ffccf36556ef0c5a9580c65b3f763683e828128b0878e26a21b2414314e78d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and links to external websites, one of which is identified as a game hack redirector. The presence of embedded URIs and the ML classifier's high confidence indicate a malicious intent to direct users to potentially harmful content. No scripts were extracted, but the document's structure and content strongly suggest a phishing or scam attempt.

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/promo-codes-for-free-robux-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/tiktok-free-promotion_GM835599320.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52C4 23704 bytes
SHA-256: 9a15583eafa16be1c727ac356a97dd6a4b9d1217d948517a9ae2f034278bb16b
font_01_sfnt_off00008875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8875 18604 bytes
SHA-256: 79f1ed749ebb86ed8378b1cb9aa6f559fb500c5101e3810faa0ee40136890037

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