Malicious PDF — malware analysis report

Static analysis result for SHA-256 757d05de7f1ff42f…

MALICIOUS

PDF

46.1 KB Created: 2021-06-07 11:27:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6d4b3c56caa15dc30df7ae1ff3d7cfaf SHA-1: 7b306eae291e11a417715d5bcce8ff2cbbb0473b SHA-256: 757d05de7f1ff42f6d9e6d209ea7ca574e3f3bd2c61f673b1979bdeece4f18c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to game hacks and presents a download button, directing users to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it is designed to lead the user to download further malicious content or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/dolphin-hacks-roblox-website-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/tiktok-free-followers_GM835599320.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-a-shoulder-pet-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://collectrobux.coIn 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_off00005399.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5399 25716 bytes
SHA-256: 69aa1e4ede6013c338e12c35e00ba783736d8f92cac106e83f34a8886bd9c066
font_01_sfnt_off00008f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F56 19116 bytes
SHA-256: 7b83c24ab3c000a1d99894cec6c615ead109910ccfd4834c6f5cae8d48d60693

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