Malicious PDF — malware analysis report

Static analysis result for SHA-256 451a3ca5a06c2e03…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 06:06:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ce797bb7c5c7a633a21df88887523053 SHA-1: c05fb820cd5ee5f1b6644b7cf195ccf06671459f SHA-256: 451a3ca5a06c2e03a5ac8b98621ac9a7de3f8ca6a6413ce6fc5efe1d54963abe
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to a known malicious redirector infrastructure, masquerading as game hacks or generators. The document body and embedded URLs suggest a lure for free game items or cheats, likely to trick users into downloading further malware or visiting phishing sites. The presence of a password-protected archive lure indicates an attempt to bypass security scanning.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-clipart-free-game-hack In PDF document text
    • https://library.iuli.ac.id/repository/sign-in-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-claim-your-reward_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-a-lot-of-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-hack-denisdaily-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/boku-no-roblox-free-vip-servers_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/optifine-pe_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-hide-and-seek-cheat_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-kids-games-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-no-phone-number_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/pro-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-cookies-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-bloxawards_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-cheat-codes-weight-lifting-simulator-3_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_off000032d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D9 22200 bytes
SHA-256: fdec222af742c6d2a55ff41217871bd1d910de39e8aa59695d90cbd86bb308e2
font_01_sfnt_off00006409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6409 18108 bytes
SHA-256: 2474ffc82d65bd1f3a3bcd80ab595ba54cd6162201fea4af08543d46b506f2eb

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