Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f9259e18aca16f…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 01:41:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f2e3e9585e208fe03eabe61b115e8694 SHA-1: 52200cadbd81e2f22bf2dbdff4d0622036741bff SHA-256: 05f9259e18aca16f1d3d1400898ab23b62eca3a175c5d9b4c81c7525daa2ff6a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector. The document body and embedded links suggest a lure for game-related cheats or currency, which is a common tactic for distributing malware or conducting phishing. The presence of embedded links and the ML classifier's high confidence score indicate a malicious intent.

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-for-coin-master-without-human-verification-game-hack In PDF document text
    • http://elibrary.perludem.org//repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-app-real_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_off000049fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FE 25228 bytes
SHA-256: 89e34b411a43bd7f0b44f44a9a445068fdbbd01f24d3ff5182bcb5ab51ec507f
font_01_sfnt_off00008216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8216 18784 bytes
SHA-256: 6b04634132052f1635ceeb8a5e95391bb10f131b044e26b57fc8571e147092b3

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