Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd887af102c191f…

MALICIOUS

PDF

33.8 KB Created: 2021-06-19 00:58:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a5d94ac81f018e637c2b8b70bbcdaf64 SHA-1: fb70e84be0721038902ca46335f6b08414ab72d4 SHA-256: 4fd887af102c191f4837a14ace87ff6b9ee4743a35353374a2fa0afeaac129b9
160 Risk Score

Malware Insights

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

The PDF document contains numerous links to websites offering game cheats and generators, with one prominent URL pointing to a potential application download. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a visual download lure suggests a phishing or malware distribution attempt. No scripts were extracted from this sample.

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/counter-blox-roblox-offensive-esp-hack-game-hack In PDF document text
    • https://lib.unitri.ac.id//repository/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-generator_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-menu_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-get-com_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/comment-hacker-mad-city-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-spin_GM406889139.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_off00002ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED4 21572 bytes
SHA-256: 22c22ab3cb3b992608b4e50b8c825e5d438766855cf934759cdff5953f0b0e39
font_01_sfnt_off00005e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E19 19308 bytes
SHA-256: e7f9296e05ef7c0f9c36f4d6adc16ccfd8a56bfc5f65e1453fe2f0c78b56bea0

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