Malicious PDF — malware analysis report

Static analysis result for SHA-256 251f936e133a8bc2…

MALICIOUS

PDF

31.8 KB Created: 2021-07-20 17:50:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: da850ec461605515c58a03ce5278b0b1 SHA-1: 7195fb1c24874a13af9be538eb7cdd29f802408c SHA-256: 251f936e133a8bc28c108298e6fea96f7152ccb143c2a0f973765dad9ce49a82
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and TikTok likes to entice users. It contains embedded links that redirect to malicious infrastructure, specifically http://netcdn.tw/app/835599320/how-to-get-free-likes-on-tiktok-game-hack. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lead users to potentially harmful content or further exploits.

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-likes-on-tiktok-game-hack In PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsalmusyarrofah-jakarta.com/__statics/gudangsoal/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF3 22216 bytes
SHA-256: d507a598041fa7cba2c10aaae77c1f1d9e30dd73430d898d8c5c1cc6a8a9c038
font_01_sfnt_off00005c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C49 17620 bytes
SHA-256: 1c33fd3c5ea4f422d018a8404ca3ef9e1ac10e3d86ac92994d8eaeb97cd646a5

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