Malicious PDF — malware analysis report

Static analysis result for SHA-256 49862f0be9aa6a23…

MALICIOUS

PDF

31.6 KB Created: 2021-07-04 05:16:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 745858f9bb8a0bc51ca0d3bda89df99c SHA-1: e4241b0bd1cdbd5afdce27ddd957642e8fa5b866 SHA-256: 49862f0be9aa6a233dbb06e94e4bd614d77ffd49030a8ee9229e33c77182c0d9
82 Risk Score

Malware Insights

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

The PDF document contains multiple links and a call-to-action phrase, luring users with promises of free game items and hacks for popular games like Roblox. The primary link, http://netcdn.tw/app/431946152/roblox-avatar-free-game-hack, is flagged as a high-risk redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit user interest in game cheats to redirect them to potentially malicious sites or initiate downloads, aligning with a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • 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.
  • 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/roblox-avatar-free-game-hack PDF link annotation
    • https://xiangquan.com.tw/image/data/files/free-roblox-shirt-download_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-make-a-free-shirt-on-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-hack-2021-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/slx-hack-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-best_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/without-human-verification-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-make-roblox-pants-for-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-hack-the-robine-on-roblox_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/cheat-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-roblox-acc_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_off00002990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2990 21088 bytes
SHA-256: 59a726f8eabcfea4808f37cb92c9ff0ff3201aca54159e53e2f5b2e1900cda78
font_01_sfnt_off000056f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56F4 18868 bytes
SHA-256: df626e97bf99c12ae2e2dc853053f4c46c230974655dd31d8497af8766a9dbba

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