Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc54bcd878f663d…

MALICIOUS

PDF

42.2 KB Created: 2021-05-14 11:51:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ebfc22361b4c9e6996c8bda79a7be83d SHA-1: 6ea2b61fa1d563a34977eee33c51d32f888bc532 SHA-256: fbc54bcd878f663d8fd23942a0db07f433b8ce82a0bc7cb991063b15acc736fd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The document body and heuristics indicate a lure for free game items, specifically mentioning Minecraft and Roblox. The embedded URLs are known to be associated with malicious redirectors, suggesting the intent is to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-education-game-hack In PDF document text
    • http://wsit.at/images/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://wsit.at/images/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://wsit.at/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://wsit.at/images/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • http://wsit.at/images/minecraft-hacked-client_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_off00004a9e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A9E 26016 bytes
SHA-256: 4027d6b8a7297233f6e3ed3d310027ea4762bc785a886f047dec8eaa5e21f440
font_01_sfnt_off00008360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8360 18024 bytes
SHA-256: bf17ed4b0ebdd3b4eae97da45cdc9952f927a0ef0c6480354077e4570e8b9627

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