Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8e2a2747a1e548…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 07:54:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 61ef7bece04df9e9f2c3d34d3c933d83 SHA-1: 0cbc419dd3ee692872bb52ac9a2d0eac932a875d SHA-256: ea8e2a2747a1e548a0d1bd4d62ac719c9fa5d870f2dbbce312d4f38b41c3d66a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector, disguised as game hacks and generators. The primary lure is 'Minecraft Games Free To Play Online', directing users to http://netcdn.tw/app/479516143/minecraft-games-free-to-play-online-game-hack. The presence of embedded URLs and the ML classifier strongly indicate malicious intent, likely to lead users to further malicious content or downloads.

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.tw/app/479516143/minecraft-games-free-to-play-online-game-hack In PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-roblox-money-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-bc-for-free-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/heroes-online-free-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-vip-gamepass-free-script_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-free-roam-camera_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robloxs-cheats-hack-os-android-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/codes-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-robux-for-free-2021-october_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_off00002f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4D 22104 bytes
SHA-256: 264562e2627af22eee944117687c1b65c4a99592c45e177063b35d9b39b49d76
font_01_sfnt_off0000601d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601D 18664 bytes
SHA-256: c1445901f71b4061cf95e5208f0f2c27ed76d2f6a65b22d2003e7abc4ada30b9

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