Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ee5b3c10c2459d…

MALICIOUS

PDF

45.4 KB Created: 2021-05-12 01:14:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a91c54dee5a061fadc5519c35e3d9726 SHA-1: a1270f154277129c00073ce1c351ec75e2713abe SHA-256: 79ee5b3c10c2459da46b71c0664e6e2a34add1df0bf2122c1efaf02655ae4b50
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text suggesting it is a lure for a "Hacks Master Coin" tool, which is likely a scam. The ML classifier flagged this PDF as malicious with high confidence. The presence of external URIs and the overall structure indicate an attempt to trick the user into downloading a payload, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/hacks-master-coin-game-hack In PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c90.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C90 24912 bytes
SHA-256: 16dfe89fdf84eab8a20d86f0efbec0a42daebb65c55caf10ca91cf3262cf55ff
font_01_sfnt_off00008562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8562 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off00009066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9066 17716 bytes
SHA-256: aea1ef4c1cd469d79511e585102869a057304cba4fed84ae86aa90ce3b018750

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