Malicious PDF — malware analysis report

Static analysis result for SHA-256 5543d8d7f0b56e74…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 06:57:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9d134904e28268affd11f4f2c73f4639 SHA-1: 116d7d1d05578fca1a024ee849c3603b4ca42889 SHA-256: 5543d8d7f0b56e74b9e074e7531b52234b558842c0eed3dd58c8a484dc30663d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, masquerading as game hacks and free in-game items to lure users. The primary redirector URL is http://netcdn.tw/app/431946152/roblox-hacks-2021-game-hack, which is flagged as malicious. The document body also contains numerous links to other PDF files hosted on hipmibadung.or.id, suggesting a chain of lures or potentially a downloader for further stages. No scripts were extracted from this sample.

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.tw/app/431946152/roblox-hacks-2021-game-hack In PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/how-to-recove-hacked-account-roblox_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-robux-games_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/how-to-get-clothes-with-codes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/savagefrey-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/roblox-studio-free-robux_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_off00003222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3222 22008 bytes
SHA-256: 40fab35e238062050f077a1b319d80e31b11ecdd73c5da4b5f08a365178343ec
font_01_sfnt_off000062c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C6 19056 bytes
SHA-256: a827687bde1c23907f75db23928d8c544c1849638492c2c48bf6e5fa6ea38882

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