Malicious PDF — malware analysis report

Static analysis result for SHA-256 4deb5b2cb973d08a…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 12:04:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4979c7fb1eb2024ab3c9f1c0cd8ec5d4 SHA-1: 7ce2deedfcced1ec54bb283cf980f493b73e7f31 SHA-256: 4deb5b2cb973d08af74a5ef775477b11e65bd97363e5c3fc2b37ee9df10fbb41
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one that redirects to known malicious infrastructure, disguised as a game hack generator. The document body explicitly contains the URL 'http://netcdn.tw/app/406889139/haktuts-coin-master-free-spins-game-hack', which is flagged by heuristics as a malicious redirector. This suggests the primary goal is to lure users to a compromised or malicious site.

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/406889139/haktuts-coin-master-free-spins-game-hack In PDF document text
    • http://perpustakaanlia.net/katalog/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/brown-hair-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/roblox-one-piece-treasure-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/roblox-cheat-codes-from-nitro-fun_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/how-to-hack-roblox-accounts-on-android_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/really-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/how-to-admin-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/gameresources-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/how-to-fly-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/ezy-youtube-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://perpustakaanlia.net/katalog/repository/today-free-spin-coin-master_GM406889139.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_off00003238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3238 22904 bytes
SHA-256: 14fe4aebca3a8097317e6d980e33e55318b31f70f56433448d239a14f21a6109
font_01_sfnt_off000065ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AB 18484 bytes
SHA-256: d9a037a653ed28116979e3af0bb76bb4d7eaba1060cd405c4d4ff8bdf95a3337

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