Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd99f380f733f56…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 00:55:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ca7b09b8c790a129d2be2276d14c3c9f SHA-1: 8dc85f643933e0873fc538cc73660cf8884f8ce8 SHA-256: fdd99f380f733f56fa3b62349c76a2ef90adabb8e08e4e532ce06d3a7ab3cdd5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' content. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting the malicious site. The ML classifier also strongly indicated maliciousness.

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/406889139/todays-free-spin-and-coin-links-game-hack In PDF document text
    • http://library.smpn2-byl.sch.id/repository/how-to-hack-knives-in-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-robux-promo-generator_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/drive-through-restaurant-tycoon-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/roblox-the-quarry-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-download-minecraft-for-free-on-mac_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_off00002fc3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FC3 22816 bytes
SHA-256: 613756b86b927a07377d76848f5a752e1dbd642705825e8ceb9a5af22e6ca0d8
font_01_sfnt_off000062a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A9 18596 bytes
SHA-256: d9f470f219aa93d1dfbcbe5b6653e5cda51e656abd72020ea50403cd11ee82f4

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