Malicious PDF — malware analysis report

Static analysis result for SHA-256 6651b7a49908cdcc…

MALICIOUS

PDF

45.5 KB Created: 2021-06-11 10:04:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: de9a40843c8903a24db7bb2b2fdb6c3e SHA-1: 1daa4c1222a0fd1d730e1eb7c043e7e760cc790b SHA-256: 6651b7a49908cdcc5b005fcf6d95ac4b7ed89175aae596f6f3d1fecd65e5f2de
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a game hack lure, linking to known malicious redirector infrastructure. The document body, though partially garbled, contains the same URL, reinforcing the lure. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent, likely leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-hack-mining-simulator-roblox-game-hack In PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/robux-cash-cheat_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/pubg-uc-600-sri-lanka-price_GM1330123889.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/pastebin-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.keperawatan.unand.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.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_off0000533b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x533B 24964 bytes
SHA-256: fa232f9f36102a497fbce75999411e46054458d676d9f600843788824d64ee24
font_01_sfnt_off00008bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFE 19452 bytes
SHA-256: 968f8d023f58bbea0079749c6c8c41e031a53b095273c0421cf184a4207c31ae

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