Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9d3d24700158a1…

MALICIOUS

PDF

34.0 KB Created: 2021-07-09 11:08:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ce5720b4fbcf0f50ea0a36e304e29141 SHA-1: b8c76aa4eb7f62a523773914fda60d5836c54dda SHA-256: fa9d3d24700158a15eb78ed67515631958b651d26674c037ae8d363e0776ee08
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-risk heuristic firing for a game hack lure, directing users to a suspicious URL. The document body and extracted URLs reinforce this lure, indicating an attempt to trick users into visiting a site that likely hosts malware or further phishing content. No scripts were extracted, but the primary attack vector is the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/rbx-place-free-robux-game-hack PDF link annotation
    • https://www.tiancom.com.tw/upload/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-cubes-of-god-hacks_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/hacks-for-jailbrak-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-wall-hack-in-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-hack-on-roblox-teacup-hack_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-cheat-codes-for-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/pastebin-hack-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-support_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/funny-free-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/1-million-robux-hack_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_off00002f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F38 22132 bytes
SHA-256: 94252b9e6a885c5b49dcd137ad5ac74742554df2b71dd29618968a4b4fc18cf8
font_01_sfnt_off00006018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6018 18944 bytes
SHA-256: 9547c61a541b439506bd5b7b0d184b57908b992205896235b1a4d0c80bc97bcb