Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc4684326f262643…

MALICIOUS

PDF

32.8 KB Created: 2021-07-22 17:52:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5a37bb8a236803ac49648679c632c6c0 SHA-1: 2e7527947606436748e60317b51b7a472a87504b SHA-256: dc4684326f2626437dcba49b36b905ecdd67e08d47c5733d4f6306e1153b21de
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game currency or followers. The document body explicitly mentions 'How To Get Free Tiktok Followers' and 'CLICK HERE TO ACCESS TIKTOK GENERATOR', reinforcing the phishing attempt. The embedded URLs are designed to lead users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/835599320/how-to-get-free-tiktok-followers-game-hack In PDF document text
    • http://gaec.cl/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://gaec.cl/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://gaec.cl/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gaec.cl/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://gaec.cl/images/free-roblox-accounts-with-robux_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
stream_002_off00002cd3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CD3 22948 bytes
SHA-256: 7b892e929d05d913f10829c2c9076168335ea788672714f6e74efe74ef2f00c3
font_01_sfnt_off00006026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6026 17692 bytes
SHA-256: efb7503bfa77ecc57b32614c06d9641da1723dd074a5c375bb93bdb3ea7f449b

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