Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3b3d9549b17ee2…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 03:11:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 712b906c847218d4baa2de6d08d248a5 SHA-1: d71ad4d3427631ebd8045958e467ad1f99476436 SHA-256: dd3b3d9549b17ee23618fd6420084a0266b6e487bbf773e09e12e0b0a4b8ede3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains multiple embedded links that are identified as malicious redirectors, specifically luring users with promises of game hacks and free generators. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-free-spin-no-offers-game-hack. The document body and heuristics strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful websites.

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/coin-master-free-spin-no-offers-game-hack In PDF document text
    • http://digilib.iailm.ac.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-hack-pc-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/dance-routine-hack-for-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/play-roblox-free-online-no-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/counter-blox-roblox-offensive-wall-hack-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-purple-hair-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-generator-20212021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-use-cheat-engine-on-roblox-without-getting-kicked_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/pubg-uc-qiymtlri_GM1330123889.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-no-survey-or-human-verification_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_off00002f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F33 23320 bytes
SHA-256: 97d9fa37f951e79e91947e51d1f8454e6e5af69e4fd25aab6776008ed5dfaee0
font_01_sfnt_off000063f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F4 18176 bytes
SHA-256: 374def243e09b78f978b163973b6414630279687ee7da3e136f049d0a4a9b1d1

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