Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6659857eb0bc1b…

MALICIOUS

PDF

37.4 KB Created: 2021-07-05 00:53:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f76958b633c340b31682c80fc8b5ce7d SHA-1: 545ce16298a6a1a35fa94e768ebe996ebe9f6ed1 SHA-256: 4d6659857eb0bc1b46959f8f94ae4abde51aa2d135e6bc2c029c104c8a2fbf3c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The document body and embedded URLs reinforce this, indicating a social engineering tactic to drive users to a potentially malicious website. No scripts were extracted, but the primary function appears to be redirecting users to a lure site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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/free-coin-master-stuff-game-hack In PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-hack-jailbreak-roblox-money_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/lua-roblox-hack-scripts_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-hack-dungeon-quest_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/swordburst-online-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/do-you-earn-robux-for-taking-free-items_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/aimbot-for-roblox-free-for-all_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-admin-roblox-uncopylocked_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-bedrock-edition-hacks_GM479516143.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
font_00_sfnt_off0000311b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x311B 23336 bytes
SHA-256: 65f8fa50d67dd547a52e5501f308979b6d59be2bb526a14786209f4288db88bf
font_01_sfnt_off000065f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F8 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDD 18140 bytes
SHA-256: 0adbfa1a4dab6338e13ea67aa32732ad7a3b3fbafcfb99206ef3c7e6ec11ff9e

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