Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdd986a5d5c0fcd6…

MALICIOUS

PDF

34.3 KB Created: 2021-07-07 07:52:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 41768440ded4cce180f3c536c9ba6f4f SHA-1: 6c335e48521103e680cd4c92af2e9a3a60876ba5 SHA-256: fdd986a5d5c0fcd62cb51899d5c887a85817799c63575170351668015a833ede
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, specifically designed to lure users into clicking on 'free generator' or 'game hack' lures. The primary redirector URL is http://netcdn.tw/app/431946152/roblox-comroblox-game-hack, which likely leads to further phishing or malware download pages. The document's structure and embedded URLs strongly suggest a phishing or scam campaign aimed at users seeking in-game advantages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/roblox-comroblox-game-hack In PDF document text
    • https://www.ruchya.com.tw/upload/files/free-roblox-account-paswords-with-robux_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-robux-obby-no-password-2021_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/fisicuffs-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/simple-ways-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/roblox-inmortal-hack_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/roblox-hack-unlimited_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-roblox-exploit-2021_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-bobux_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/free-robux-without-human-verification-real_GM431946152.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_off00002fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE6 22496 bytes
SHA-256: 9ecac27af6acc0022b2f938f20a361b5103c44a37909f77bb033b0370e8da1c3
font_01_sfnt_off0000620b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620B 18748 bytes
SHA-256: 7b51ac7cd0d997d75be22500c2cba7076fd8e57e03e7cc1f9d0443fc391da534

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