Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74c822ade2f4ae0…

MALICIOUS

PDF

34.1 KB Created: 2021-06-20 11:51:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 795299a970f4629d30a4c95c99425c51 SHA-1: 41bdf3d62ae7968054e5c24994c002d77a63d643 SHA-256: b74c822ade2f4ae03aa8ce5814e6749eef433db2af61fb0343b39f1ee5451fde
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains multiple embedded URLs and a document body that explicitly mentions game hacks and free in-game items for popular games like Roblox and Coin Master. The ML classifier strongly flagged this PDF as malicious, indicating it likely serves as a lure to download a second-stage payload. The presence of numerous URLs related to game cheats suggests a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.co/app/431946152/roblox-unboxing-damage-hack-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/cheats-for-elemental-battlegrounds-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/sonic-boom-shirt-in-roblox-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-tycoon-simulator-cheat_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-a-roblox-hat-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-verification-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-hacks-link-description_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-gift-card-codes-2021-not-used-england_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-no-verification-no-survey_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
font_00_sfnt_off00002f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3E 21996 bytes
SHA-256: 3537444d94ac8466b4e5b7c6991038fac1bd6dd0d668d53137927d82bbbb55ec
font_01_sfnt_off00005fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEA 19204 bytes
SHA-256: 77cc5fa5f5a3c1d9197c0eaa6f669093173287acf29ffe245bc9d729d7ccc18a

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