Malicious PDF — malware analysis report

Static analysis result for SHA-256 9088ed72ebd295ed…

MALICIOUS

PDF

43.9 KB Created: 2021-06-09 01:36:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c22de59951372d40c6d8c1b9670202f7 SHA-1: e837bb143735767bc4409b0421b85953d75d74ae SHA-256: 9088ed72ebd295ed26846a4c19f32642e4037971d3226962f378b37a65f1e207
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a game hack or free currency generator. The primary link, https://netcdn.tw/app/431946152/hack-robux-roblox-download-game-hack, is identified as a malicious redirector. The document body, though partially corrupted, contains references to game hacks and download prompts, reinforcing the phishing lure.

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/hack-robux-roblox-download-game-hack In PDF document text
    • https://opac.itp.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/websites-for-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/oprewards-login_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-glitch_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
stream_004_off00004e0d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E0D 25528 bytes
SHA-256: 86c93b27bdc21e3254331d6eea61e3d7b3b2e7c5724d138ef5d53572d1764ad2
font_01_sfnt_off00008718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8718 18828 bytes
SHA-256: b930828c93a35276059f8c163e153a7cb4a08e52592c4332c7f0e6b0b0154086

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