Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd57c6baffc72f20…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 08:08:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9497c6bed677f1e5c29c3a69c154bf95 SHA-1: 7a7e6ca461b30405415b826da0bfbacb08a27078 SHA-256: fd57c6baffc72f20625bb711022c966a16c083b527f0f2609b9227e6385a1de3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of game hacks and exploits to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or downloads. The document body and embedded URLs reinforce this phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-exploits-for-roblox-2021-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/free-codes-for-robloxcomtoys_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-play-free-without-downloading_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pubg-uc-kaise-khariden_GM1330123889.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/774-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-a-face-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-coding-classes-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-dragon-ball-rage-all-gamepasses-hack_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
font_00_sfnt_off00003021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3021 22556 bytes
SHA-256: 9a6638517c1ea5b4d0cb5d785eabe6a900e7610aba8c1f5dce227332b3d44316
font_01_sfnt_off0000623a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623A 19452 bytes
SHA-256: bec627d17f093b33e49b0434b5bdf516a610f6057dc9b01d7701c32ef092f98c

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