Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f7db27902d0b3c…

MALICIOUS

PDF

43.9 KB Created: 2021-05-20 06:58:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cfd287a59ed87568b714f81e360f543d SHA-1: d95f486a96a3dd5d0dc9e1b0a7ee175e933f76ef SHA-256: 53f7db27902d0b3c081927e2109843df1463d8ae5bcc14e23c9709d36352e86d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks and free generators. The primary lure appears to be related to Minecraft, directing users to a URL that likely serves a malicious payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/479516143/minecraft-on-computer-free-game-hack In PDF document text
    • https://www.knjigebuducnosti.com/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/freerobux-co_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004781.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4781 29056 bytes
SHA-256: 3c44910fc6cf0a1bd5009b8e551afe6432c95d607800e8a57e84bcdb9c3e8c79
font_01_sfnt_off00008977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8977 18284 bytes
SHA-256: ce17ca81234478eae2e4d5d82743db6ecf39d6315d037818deed1e54c2e5b17b

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