Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7553b3d55fa7c39…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 18:40:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 63938b9c19d60a2b7a344a7379a85c5b SHA-1: cdc67ae2caf95cd511b6ec4f9dfce0d2a445d825 SHA-256: e7553b3d55fa7c391b5afef5366c6071117de575cf90e01b9a8a6acd3f2482a5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and cheats for popular games like Roblox and Coin Master. The primary lure appears to be the 'Roblox Synapse Hack' leading to http://netcdn.tw/app/431946152/roblox-synapse-hack-game-hack. While no scripts were explicitly extracted, the heuristic firings strongly indicate that these links are intended to lead users to malicious sites, likely for malware distribution or credential harvesting.

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/431946152/roblox-synapse-hack-game-hack In PDF document text
    • http://digilib-ppsunisma.ac.id/repository/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/youtube-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-f-88-gun-free_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-test-server-free-obc_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-assassin-cheats_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-models-into-roblox-t-shirts_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-boku-no-hero-academia-cheat-engine_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-2021-working_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-how-to-get-obc-for-free-lifetime_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/robux-hack-fake-credit-card_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/make-free-roblox-shirts_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/robux-game_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_off00002e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E02 22332 bytes
SHA-256: 9996773d0d659b95f5161ccef8125d950a59ca4f6e222eae69e531ad25c721af
font_01_sfnt_off00005fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB5 19012 bytes
SHA-256: 3382886592bb468489b95c1f4c613cd1f169f54b8051a514a613a8a03f1c7aa5

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