Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d07212b2da7a14c…

MALICIOUS

PDF

42.9 KB Created: 2021-06-04 04:29:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5de6a821f7d9782ac8539fb06d132f8c SHA-1: cb236ad16000054e39b3e8b277692bfea08eec73 SHA-256: 5d07212b2da7a14caef9414676bcd05e8b504f3fec475848f34390faba46dff3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting "free generator / game hack" lures. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/406889139/legit-free-spins-coin-master-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-tablet_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/rbx-claim_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
stream_004_off00004daa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DAA 24184 bytes
SHA-256: b744fced353dc6986512ca208a0b27703d8de96ae2fbaa19e7b1a12a3db5bede
font_01_sfnt_off00008519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8519 18176 bytes
SHA-256: 0e4f5fc6ff2fec7c34f7a60300b1fa14fa22cd043badad59a9fad54dc28be7cf

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