Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5c9b62e5e2a52a…

MALICIOUS

PDF

33.8 KB Created: 2021-06-19 13:32:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9d2a44daa67b3a90348a6b083e4f1865 SHA-1: 6d736ed5cd9c6b30d7535b7751cbbe9a4177a1ed SHA-256: fc5c9b62e5e2a52a61dd20300a48108748674f35d9a4c406eddb6945ca616111
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting "free Robux" and game hacks. The ML classifier strongly flagged this PDF as malicious. The primary lure appears to be a "free generator / game hack" which leads to a redirector URL, likely serving as a gateway to further malicious content or exploits.

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.co/app/431946152/free-robux-cheats-codes-game-hack In PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/pubg-600-uc-free-redeem-code_GM1330123889.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-clothes_GM431946152.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-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-changer_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-spin-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/free-robux-com_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-android-root_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7D 21864 bytes
SHA-256: cf92e1d5807c5b65cf2df3fc3955e70be7dcc3b26019568728b84a57591c37dc
font_01_sfnt_off00005eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECA 19160 bytes
SHA-256: ba10fcf78e55566dfc8213f242372e941af92b381cb007e94645661014d27aa2

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