Malicious PDF — malware analysis report

Static analysis result for SHA-256 c472208e4c285667…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 08:31:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b9bb71aeee19e1bf43d63d2a3faa7234 SHA-1: b29336b613bf8b03824daa356671ec47dba0539f SHA-256: c472208e4c285667f4d947a195bdbf67c198d00f76d735d6b8f6d8d362d1d5d0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game items and hacks, directing users to a known malicious redirector. The document body contains the primary malicious URL and numerous other related URLs, suggesting a phishing or scam campaign. The presence of embedded URLs and the nature of the lure indicate a likely attempt to trick users into visiting malicious sites, potentially for credential harvesting or further malware delivery.

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/free-roblox-promo-codes-for-robux-game-hack In PDF document text
    • https://3qblocks.com.tw/image/data/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/can-you-make-a-shirt-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-tutorial_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/one-piece-treasure-hack-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-1-coin-master_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_off0000319b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319B 22332 bytes
SHA-256: 4c0e1af12b398cc129a63f3c25ab20ac10b318f2d8a30b0e1a437d0e5280ba8e
font_01_sfnt_off00006381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 19380 bytes
SHA-256: b9e13cbc0d8b8e2fa33e227b4ba01f3d99a632c345b6e3dc52c76698f84cc7c7

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