Malicious PDF — malware analysis report

Static analysis result for SHA-256 989655344f6dfdf0…

MALICIOUS

PDF

32.9 KB Created: 2021-07-09 20:20:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 96b54d9ea62e6fdb6e2ced0ffe5d63ec SHA-1: 8a17b1df2cf6faf7a37a4dfe4f1d547ab23e77f4 SHA-256: 989655344f6dfdf0ef2d1f23a1635fa562d0be2edf74f816370b1f5434f47c6f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains lures related to game hacking and free generators, directing users to external URLs such as http://netcdn.tw/app/431946152/how-to-hack-roblox-accounts-on-phone-game-hack. This pattern is consistent with phishing or scam campaigns designed to trick users into visiting malicious sites. No scripts were extracted, but the embedded URLs and document content strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/how-to-hack-roblox-accounts-on-phone-game-hack PDF link annotation
    • https://www.toyogas.com.tw/upload/files/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/roblox-hack-robux-infinitos_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/free-robux-jpg_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/robux-hack-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/roblox-free-items_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/howto-get-free-robux-hack-javascript-2021-not-patched_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/free-robux-100-life-free-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/hacks-for-free-robux-on-roblox-no-human-vertify_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/apk-hack-game-roblox_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/coin-master-free-spins-heaven_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/food-empire-hack-roblox-2021_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_off00002b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B1F 21676 bytes
SHA-256: 62810625accd6b5b310c36329b9c45e0a8330e8faf70de69a07a8cff66bb13e8
font_01_sfnt_off00005aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA6 19384 bytes
SHA-256: 084794c69c3a15ed1330993b6e362ce24a67b8c731d0da79d42958a9f82904df

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