Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d5f55dba25348a…

MALICIOUS

PDF

45.2 KB Created: 2021-05-19 01:43:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c5dcbbac5d3f5a7b488280c3b98f3403 SHA-1: ae927e145ffc70747e5d692040b68588ed396de6 SHA-256: f4d5f55dba25348a31ef3cb698675d253076b43fd16d2c7c927b0ee4e962aa17
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting "game hacks" and "generators". The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hack-spins-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering lure designed to redirect users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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/coin-master-hack-spins-2021-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/cm-spins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/level-coin_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-change-your-username-on-roblox-for-free_GM431946152.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_off00004a5d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A5D 25100 bytes
SHA-256: e5d7ad51d958de51eea8705789087b9bb4e6d02cafe56101e77551426543a75b
font_01_sfnt_off00008402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8402 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB3 18296 bytes
SHA-256: 61cecf6a4c388f1fb11619cb83ff3032a0515dcce7f43e45d64b24393b5c3288

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