Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec05f599293312a…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 09:59:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c41e1cf915fc1bbd9abaf446d6fabf98 SHA-1: c856afa48f9ebbe4fb4dd2508871f02b9d21fcf4 SHA-256: 3ec05f599293312ae4423fc248992b0af70970f6cc79e58b13ec1db2e4017fe3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/835599320/tiktok-free-folowers-75-game-hack. The document body and heuristics indicate a lure for game hacks or free followers, suggesting a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/835599320/tiktok-free-folowers-75-game-hack In PDF document text
    • https://smark.com.tw/image/data/files/robux-download_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/cheat-roblox-fr_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-moonactive_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-green-hair-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-for-free-online-no-download_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-robux-hack-script-for-free-robux_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/pubg-uc-meaning_GM1330123889.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/alguna-manera-de-hackear-cuenta-de-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-deals_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-hack-roblox-pc-2021_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-rare-cards-hack_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_off00003192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3192 21748 bytes
SHA-256: 61b45e8921afb9e89d2a0332a180ca843e4b68509acc94c95b7fefcd66dc6e6d
font_01_sfnt_off0000619f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619F 18400 bytes
SHA-256: 43162fa3c013417018d161c69282e983b0d09554a145c634b9a60ef64194c520

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