Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0cf75aabb5a416…

MALICIOUS

PDF

35.0 KB Created: 2021-07-08 21:12:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 07fb0a27bf0a288ccf0692ffacc8472a SHA-1: 1f2bae5a71fbe44a6fa520abadd3e5b9835b714f SHA-256: ad0cf75aabb5a4162b14eb941cef0c9e5d982ec3a82bdfa8ccd8eaa734c9ae9f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The primary lure is for 'Coin Master' and 'Roblox' cheats, directing users to download further malicious files or visit compromised sites. The document's structure and embedded URLs strongly suggest it's part of a campaign to trick users into downloading malware or visiting malicious websites.

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/today-coin-master-spin-free-game-hack In PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/nopde-engine-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/roblox-robux-hack-v1-34-download_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/best-hack-of-roblox_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/online-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/is-hacking-robux-impossible_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-premium-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/roblox-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/roblox-apk-download-free-robux_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/working-method-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/granny-roblox-free-money_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/hacker-robuxco_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-roblox-hack-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.6636.com.tw/ad6636/upload/files/hack-coin-master-net_GM406889139.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_off0000321e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321E 22780 bytes
SHA-256: 0fe6373f83cebfaebac3f7e846a55647cdd1832293991c8bcf6928d9d022cc30
font_01_sfnt_off0000652e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652E 18528 bytes
SHA-256: e2ba7301b642d01bbb1534f76a73ee61ba5af41067a1fa1e156a956a78038ecf

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