Malicious PDF — malware analysis report

Static analysis result for SHA-256 685dd8e370c07de9…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 11:20:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cef326ff56da66c836339c50abd15653 SHA-1: 5f7e8164b88d6061143a2ee5bc576e3402fbe145 SHA-256: 685dd8e370c07de9476f973aea33f435a7941d842fc2bee938d0b8b84c6d76e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/daily-free-spins-coin-master-2021-game-hack In PDF document text
    • https://lib.unitri.ac.id//repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/pokemon-go-free-pokemon-generator_GM1094591345.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/tiktok-free-promotion_GM835599320.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/robuxglobalcom-no-verification_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_off00004ed9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ED9 25720 bytes
SHA-256: e2fb47da682ea65b642f89e811242c54a692fb0a1af1fd953d6a14013e2cb5f2
font_01_sfnt_off0000893e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893E 18708 bytes
SHA-256: 76af36f54327e394f6a0995f5c1804c6d580e71cb7eebf938ec25838add40309

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