Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fb27009c40e4824…

MALICIOUS

PDF

34.8 KB Created: 2021-05-20 22:46:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4a8910e5e4150115fc041297cebf5048 SHA-1: 6c074f4c76e2cf47c83906254936ef631150dbed SHA-256: 4fb27009c40e4824a3e298bf44c97be955524c4fb2ec763c0fc4155bd94cbf8a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a malicious redirector infrastructure, disguised as generators for popular games and services like TikTok and Robux. The document body explicitly mentions 'Free Tiktok Likes App' and 'CLICK HERE TO ACCESS TIKTOK GENERATOR', reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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.xyz/app/835599320/free-tiktok-likes-app-game-hack In PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://www.yantan.com.tw/upload/files/pubg-uc-id_GM1330123889.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_off0000318a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x318A 24052 bytes
SHA-256: cfcdd0aac7e8068c66a1e8341be9974adf7b7534a31cd278bd719f4ec4bddf1d
font_01_sfnt_off00006887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6887 17632 bytes
SHA-256: 7e13fbc4119f45c5ff512709f8e7b8078fcbed6cc64991a23ef627420002bfc1

Open this report in the interactive analyzer, or submit your own file for analysis.