Malicious PDF — malware analysis report

Static analysis result for SHA-256 097b4391da7e7776…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 07:57:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: c8d8dace6bf2c022c20ad2ef1efcb822 SHA-1: fc2a9095f92096e4992ac28d20a839b60b347848 SHA-256: 097b4391da7e777692f3d867b5050cef0777849aefa05a12d52c7a0f9b1c3c81
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors, specifically advertising game hacks and free coins. The primary lure appears to be 'Master 8 Ball Pool Free Coins', directing users to 'https://netcdn.online/app/406889139/master-8-ball-pool-free-coins-game-hack'. The document body is heavily obfuscated, but the embedded links and heuristic firings strongly indicate a phishing or scam attempt designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/406889139/master-8-ball-pool-free-coins-game-hack In PDF document text
    • http://slim.sisminkada.net/repository/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/robux-redeem_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-coin-master-coins_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
stream_004_off00004d3d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D3D 24724 bytes
SHA-256: 857e374c3f96e3ce41d2d2248c8b4db1976ee3fbfec5bb13b4858b6aeaf7d09d
font_01_sfnt_off000085cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CD 18364 bytes
SHA-256: 6e0a537e63e8d7ae493ffba7f694c0e5cbb50b5e44b8f04c82ad864b2eef269a

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