Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef71777900f0e68…

MALICIOUS

PDF

49.9 KB Created: 2021-06-10 22:33:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e047d166223de3244ea967d344c0b75d SHA-1: 35f72f41e9269675eeddfbdb636e72af5d0fc789 SHA-256: bef71777900f0e68355be88b65d82a8c38c74ef085d231ecf7575a7f6459ad64
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The primary lure URL is https://netcdn.tw/app/431946152/youtube-roblox-hack-elemental-battle-ground-game-hack, which is designed to trick users into downloading further malicious content. The document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/youtube-roblox-hack-elemental-battle-ground-game-hack In PDF document text
    • http://www.eptaviation.com/images/roblox-girl_GM431946152.pdfIn PDF document text
    • http://www.eptaviation.com/images/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.eptaviation.com/images/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.eptaviation.com/images/how-to-hack-roblox-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.eptaviation.com/images/tiktok-free-views_GM835599320.pdfIn PDF document text
    • http://www.eptaviation.com/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eptaviation.com/images/roblox-garbage-simulator-script-hack_GM431946152.pdfIn PDF document text
    • http://www.eptaviation.com/images/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • http://www.eptaviation.com/images/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://www.eptaviation.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.eptaviation.com/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.eptaviation.com/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://www.eptaviation.com/images/how-to-hack-robux-items-for-free_GM431946152.pdfIn PDF document text
    • http://www.eptaviation.com/images/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://www.eptaviation.com/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.eptaviation.com/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eptaviation.com/images/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://www.eptaviation.com/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://www.eptaviation.com/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.eptaviation.com/images/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • https://www.communes.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fb4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FB4 28504 bytes
SHA-256: bda608a11a23cecd66a6b69e3f7cc72bfd3c658ba94c0e326c0286ddad6adb11
font_01_sfnt_off0000916d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x916D 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E15 19020 bytes
SHA-256: 641037013ba8f6409eac146a8b6af4a8642051db0dd174680694803a27042791

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