Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ce92a3069cd010…

MALICIOUS

PDF

44.9 KB Created: 2021-06-11 09:12:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 50857160166a3cb606e1e330ecb60be0 SHA-1: e9295cddfa30fb616a6a9f0eaa68c05df1ecddfa SHA-256: b3ce92a3069cd01075a317c129b3b96fd6fa013f3aaa8887bca3def2e2726e5e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generator / game hack' content. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to lure users to potentially harmful sites. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

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.tw/app/431946152/orocash-free-robux-game-hack In PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/hacking-ryrylol3-on-roblox_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/is-it-easy-to-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/cheat-code-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-cool-robux_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • https://collectrobux.coIn 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_off000050ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50ED 26488 bytes
SHA-256: 2a75f0d6c846a5b7be9b04bce11b6fea7142d3f6290093433083d74e41d32b41
font_01_sfnt_off00008cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB2 18408 bytes
SHA-256: 110b04653dae69c854b4a32739efc7c68e9afb116ed8583e842a4ab1d53cb657

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