Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f16e059aaab330f…

MALICIOUS

PDF

42.0 KB Created: 2021-05-16 02:17:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 47a16024c59eea9a3a5a93c58092ce70 SHA-1: 524d16743a89e5ef114877aeebe75524b1cb6b01 SHA-256: 4f16e059aaab330ffb0099ca55e04df5f41baa28728ebf40af36a1e826689567
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the redirector. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or scam attempt, likely using a social engineering lure to direct users to a malicious site. The presence of a download button lure further supports this conclusion.

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/freespinandcoin-game-hack In PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/www-robux-com_GM431946152.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://learning.min1rembang.sch.id/__statics/gudangsoal/files/promo-codes-for-free-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_off00004aed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AED 25204 bytes
SHA-256: 632ecc0d74f523b1e823ecae0fdd9b9d3d1a5d0238e6c88b9df4e4f986ccfc7d
font_01_sfnt_off000082ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CA 17956 bytes
SHA-256: 1c693cd3c749c7deb88a93ce437f6f23953c7e7e8560ccdde2498ee9463f8dc4

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