Malicious PDF — malware analysis report

Static analysis result for SHA-256 6619eab31dc6cf98…

MALICIOUS

PDF

44.0 KB Created: 2021-05-31 02:01:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 305ffd50a29bae3fe016cf809b2bc4e9 SHA-1: 1e0f3cff71ed9b69ca7f718e91cf23b297148ad9 SHA-256: 6619eab31dc6cf989a5598c0777582e46f1e25f3e60a48198f71553c2760c233
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as offers for free game items and accounts. The primary lure is for 'free Minecraft server' or 'free robux', directing users to URLs like https://netcdn.xyz/app/479516143/free-minecraft-server-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt, likely involving redirection to further malicious content or potentially exploiting PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9463

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/free-minecraft-server-game-hack In PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/minecraft-free-online_GM479516143.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://spear.com.hk/wp-content/files/fsqm-files/can-you-get-minecraft-for-free_GM479516143.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_off00005307.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5307 24412 bytes
SHA-256: 2aa200dfceb936d7804f9daeb4a3b38736b8cc2122d87294ccb1907e6a54de1e
font_01_sfnt_off00008ad5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD5 17684 bytes
SHA-256: 971ebce79d03a5424fa8491ae570b1f65fe2ad06e00737069ab54be99501e2e8