Malicious PDF — malware analysis report

Static analysis result for SHA-256 b142e2bf384d3109…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 08:00:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 22d45e7ec855f755da129fdbda220983 SHA-1: 099c1a4a4ccb6ca8479a2c0b787c1554b546f3f4 SHA-256: b142e2bf384d31098bce9ff504632c194f1514a8c16bc89396136bf1b50adb10
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free currency. The primary lure is the URL http://netcdn.tw/app/479516143/minecraft-free-download-2021-game-hack, which is associated with known malicious redirectors. The document body and heuristics indicate a social engineering tactic to trick users into downloading potentially harmful files.

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-free-download-2021-game-hack In PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-its-free-meme_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-jailbreak-hack-client-download-free-2021_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-free-game-pass-hack_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/robux-hackaron_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/welcome-to-roblox-hack_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-get-free-robux-without-hacking-2021_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/cheat-arsenal-roblox_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/how-to-hack-counter-blox-roblox-offensive_GM431946152.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://tanahlot.id/assets/CKImages/files/free-money-assassin-roblox_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_off00003076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3076 22500 bytes
SHA-256: 666826693022c0fae893f8de5500fc051c429b6b2449fd2466aa90521a4e59dc
font_01_sfnt_off000062b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B6 18980 bytes
SHA-256: 36976dda1236646de4177dc54acc9d6ee631510c343a87c6d0858b98a716bba5

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