Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1738661ab326aa…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 03:57:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e203334dac7d929b38369dd4d893db4b SHA-1: 3e82549cb02fa1824bc967b14af8cbc5dded9b8d SHA-256: 0d1738661ab326aa78fc67808dfcdbd842b6bfc7a0eda9f427d4deb559d02319
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games. The ML classifier strongly indicated maliciousness, and the embedded URLs are associated with known malicious redirectors. The document body and embedded URLs suggest a lure for users seeking in-game advantages, which ultimately leads to potentially harmful content.

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/406889139/coin-master-cracked-apk-free-download-game-hack In PDF document text
    • https://silvterie.com.br/images/ckfinder/files/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/games-that-give-you-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/how-to-get-free-robux-earnrobux-today_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/good-roblox-roghoul-hacks-to-get-rc_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/freecoins_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/how-to-have-free-clothes-on-roblox-2021-no-bc_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://silvterie.com.br/images/ckfinder/files/roblox-hack-robux-apk_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_off0000303a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303A 22772 bytes
SHA-256: b5e5c1633bd639a63ae00b19ca13f7bea0d46243b0d43733f8224aa64db40501
font_01_sfnt_off00006304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6304 18924 bytes
SHA-256: 55716a7eef5342f175226249442460552699f57233d89bd721837c942058d113

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