Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb9e811881e026b…

MALICIOUS

PDF

35.9 KB Created: 2021-07-09 19:10:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 56746f39bbcd67c1fdc0aa25c055922b SHA-1: 7163e308e759a3587092b05349611013858e1ce9 SHA-256: 5fb9e811881e026bd00886949c661a4f425b65840ed61e48336484c42b81d5ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free currency' for popular games. The primary malicious URL identified is http://netcdn.tw/app/431946152/roblox-jailbreak-hack-download-game-hack. The document body and embedded URLs strongly suggest a lure for users seeking cheats or exploits, leading them to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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-jailbreak-hack-download-game-hack In PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/how-to-exploit-with-cheat-engine-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/roblox-how-to-get-a-shirt-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/free-robux-apps-that-actually-work-quick-download_GM431946152.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/fake-hack-code-copy-and-paste-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://elearning.man1padangpariaman.sch.id/__statics/gudangsoal/files/free-minecraft-wallpaper_GM479516143.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_002_off000032d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32D7 22832 bytes
SHA-256: 88a34d62a1f1bd090f73af4b6e325d542fbc60c9ce421324a2c638e0baf5eddd
font_01_sfnt_off00006631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6631 19448 bytes
SHA-256: c6b402b96529d0790e5d7e1f1484851c98e2ea285be43ed7d04bfb6fa8727121