Malicious PDF — malware analysis report

Static analysis result for SHA-256 34b96dcd1b4cf5f1…

MALICIOUS

PDF

35.1 KB Created: 2021-06-27 11:16:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9757aabd972735386d01c335e56dcbac SHA-1: d37e62987f8ce2eff2bd96f52e51c106715ee574 SHA-256: 34b96dcd1b4cf5f107a5d222eb50e305bae5c2aa6bf94a3b0f0152d0fbffdac5
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically http://netcdn.co/app/431946152/google-show-me-how-to-get-free-robux-game-hack. This link is presented as a lure for "free Robux" or game hacks, a common social engineering tactic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests it likely leads to a payload download or phishing page.

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/google-show-me-how-to-get-free-robux-game-hack In PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/cheats-for-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-hack-roblox-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/roblox-earn_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/roblox-com-www_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-robux-real-no-scam_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/www-roblox-cheatuscom_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/minecraft-free-school_GM479516143.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/roblox-cbr-free-weekend-glitch_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/icloud-the-cheating-app-for-roblox_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://unsla.uns.ac.id:443/pgsd/repository/free-roblox-vip-servers_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_off00003318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3318 21872 bytes
SHA-256: d38599f3952100dc8a6934eaf3d211cefa75f5b2ad4c36a0f4c3e2b2e7cbf6a5
font_01_sfnt_off00006340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 19420 bytes
SHA-256: fccebe485d5d066deb38f76a1fc67552ac1591f1885080fd6ca248d14537a2c8

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