Malicious PDF — malware analysis report

Static analysis result for SHA-256 230a85fe7b1616d9…

MALICIOUS

PDF

48.2 KB Created: 2021-06-08 22:51:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d8af5b5f01e7d880e51820ab55e2cf78 SHA-1: a683ab2c85e127241d10b168fdb8785fc5eb67b4 SHA-256: 230a85fe7b1616d9b55a6c3b647d6563fabc3d2bcd807484fef629815e7c5111
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to known malicious redirectors, specifically promoting 'free generator' or 'game hack' lures. The document body, though heavily obfuscated, contains references to these lures and the primary malicious URL. The primary malicious URL is https://netcdn.tw/app/431946152/how-to-get-free-robux-dylan-game-hack, which is likely used to host or redirect to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/how-to-get-free-robux-dylan-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/grab-points-login_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-conins-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-lvel-up-in-naruto-beyong-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f17.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F17 26328 bytes
SHA-256: f141a98b8d5d3ef0654ec4d8f56d96bf2270335cd2d9691e879400f5a22d6071
font_01_sfnt_off00008a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A32 4040 bytes
SHA-256: b52c45903063c68ddac4d6aef6aa6bfd21fcb36297c4c3a7174f4a9ff53286f0
font_02_sfnt_off0000978a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x978A 18932 bytes
SHA-256: 58956d027d576640592063658a1f275f9e3d4949747980bb60fe8043bfca047d

Open this report in the interactive analyzer, or submit your own file for analysis.