Malicious PDF — malware analysis report

Static analysis result for SHA-256 f025fcf06bcbf3e2…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 03:19:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 474073cfaf17a45ae05a399c6d2a90e7 SHA-1: 6a258cb9617fda9aadbfab0061bca1c8d4d98154 SHA-256: f025fcf06bcbf3e25d71d8fd88a6ec131bf3e920f481260bae71a1f116234265
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a free generator or game hack. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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/orewards-com-free-robux-game-hack In PDF document text
    • https://knj.com.tw/image/data/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/coin-master-fan_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/welcome-to-roblox-account-hacker_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-colouring-drawings-of-roblox-characters_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/cheat-roblox-granny_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/how-to-get-free-robux-easy-on-tablet_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/roblox-mad-city-hack-money-francais_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/roblox-new-catalog-items-free_GM431946152.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/free-tiktok-like_GM835599320.pdfIn PDF document text
    • https://knj.com.tw/image/data/files/roblox-hack-accont_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_off00003470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3470 22160 bytes
SHA-256: 6adbcf7fcf7af4b05b245b906ffb092467f20a4c6b344fcca5b4fd6a67080e07
font_01_sfnt_off00006569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6569 19312 bytes
SHA-256: 2fc58e6e34b5e1a71d14c980e21155da553bce1e3a50e036c939353e45099324

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