Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3409dec654c99c3…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 11:12:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6a8df51b37d8145c3e1080c833636742 SHA-1: c4070421c20814d8fb7a0f345dfd582ec6075848 SHA-256: b3409dec654c99c3ebd0af43dc0ff6521ec01affb815974d0dde369dff565e2d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to entice users to click on embedded links. The primary link, http://netcdn.tw/app/406889139/how-to-hack-m-coins-mcpe-master-game-hack, is identified as a malicious redirector, indicating a likely attempt to lead the user to a malicious website or download. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt.

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/how-to-hack-m-coins-mcpe-master-game-hack In PDF document text
    • https://dentmate.com.tw/image/data/files/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-hack-1-2021202100-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/robux-rewards_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-rocitizens-codes-for-free-items_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-abs-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-get-free-roblox-faces-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-robux-quick-easy-cheat_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-2021-account-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-spin-bonus_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_002_off00002da2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DA2 22968 bytes
SHA-256: 167bc20b58f4ba342a5d8f211585f1dbf91549957e78c7deb7e3d4e7f070037d
font_01_sfnt_off0000617c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617C 18344 bytes
SHA-256: ab5992d8208103665e88bb87f17abe6e5121c78e3422836785a640f915820765

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