Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c833507c50fd03b…

MALICIOUS

PDF

44.2 KB Created: 2021-05-30 20:08:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e341c92404e6d821f9a1bb04eb21c3f5 SHA-1: 96f2ad184c5a087e3608de248b061bb457228c4f SHA-256: 4c833507c50fd03bd0ad2669755d7c75181b5e163a86d8f0cb70e44810af3712
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links disguised as offers for free game items and hacks, such as 'how to get Minecraft for free'. One critical heuristic identified these links as pointing to known malicious redirector infrastructure. The document body and embedded URLs strongly suggest a phishing or malware distribution lure, likely intended to lead users to a site that either hosts malware or attempts further social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9580

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/how-to-get-minecraft-for-free-on-pc-game-hack In PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.choidy.ch/wp-content/uploads/fsqm-files/free-robux-legit_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_off0000516d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x516D 25292 bytes
SHA-256: 3cd8870d99bd97880bf9006f07b37b3c9be655e4259bddc38fb4700156a7b330
font_01_sfnt_off00008ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD9 18028 bytes
SHA-256: b9422edf84f92072c73e95211b34a92c0a0e69f845a714fee2d613fe1b4264b0