Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1518debcb26b929…

MALICIOUS

PDF

32.0 KB Created: 2021-06-09 03:43:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 76d23e6a2d40007ca5e4adb538d4f0f8 SHA-1: a6023a818feb41031dff77802dde2a21d3eaf5a6 SHA-256: e1518debcb26b9290d866b39f299f172fe2914194d9bd2e76a27f20af2eb8be7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a 'free generator / game hack' lure, a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs point to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into visiting a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 3

  • 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.
  • 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/how-to-use-free-models-in-roblox-game-hack In PDF document text
    • https://library.fdk.ac.id/repository/roblox-hack-generator-club_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-hack-bars-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-admin-roblox-map_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/good-hacks-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-coin_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-hack-v3rmillion_GM431946152.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AA 19046 bytes
SHA-256: 849541af22b67ba42abc249ba385e1b24af4133c561a14270517b67bc4d132e2

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