Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4548480dc544f27…

MALICIOUS

PDF

47.1 KB Created: 2021-06-04 04:09:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7daa8358324704ee42fc1ec1ba4b0613 SHA-1: 803faeee3879b8f2e7133688aae987b8a7c05a92 SHA-256: a4548480dc544f274f8fe0ba7a4ab071e1dddd82ecfdc7e6bce5c5e211d23bc0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded URLs and a heuristic firing for an external URI, all pointing to sites offering game hacks and cheats. The ML classifier also flagged the PDF as malicious with high confidence. The presence of a 'download button' heuristic further suggests a lure to download potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/431946152/mistplay-robux-game-hack In PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/tiktok-free-likes_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/give-me-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-snacks-on-coin-master_GM406889139.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_off00005282.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5282 28564 bytes
SHA-256: 7bb057ef71cfc43d755a0d4dde5076b1a3874686125a10b511eb935205a386ce
font_01_sfnt_off000093c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C9 18928 bytes
SHA-256: 4353d9d8b624be656c092b8c8f3622dfb05908b0fd9cf93c1f73531fdc9e42e9

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