Malicious PDF — malware analysis report

Static analysis result for SHA-256 89390ca00a2e4a04…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 23:07:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 290d72922a8cf11d48d1e2a9144674c5 SHA-1: 7457b08a54b41276a6bdfc9c1b9604250dd9b45b SHA-256: 89390ca00a2e4a04de8f8667516b42f5c8562beb25985b6860874718bd93b142
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, leading to a "free generator / game hack" lure. The presence of embedded URLs 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 0.9971

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.xyz/app/406889139/free-spins-coin-master-ios-2021-game-hack In PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/hack-client_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/optifine-pe_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-can-i-get-robux_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_003_off00004aa7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA7 24428 bytes
SHA-256: bac7e5e32ed17288566b27733cab459984f21c7324234761a840d39054b21b37
font_01_sfnt_off00008279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8279 18288 bytes
SHA-256: 33dea10a5a633473ad7171de371eb5bee55008ca682d385727c80e9101e9f1e4

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