Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3edd6c34304790…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 11:13:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 81471cbce2afb1d9bb3472ac9858c019 SHA-1: e59858fcb4f9ce1a5ad7619e0ee425425634fd31 SHA-256: cd3edd6c34304790c19123978c19abfc79db8107539d1acf6970e3e73ded635e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/479516143/how-to-get-java-minecraft-for-free-game-hack. These links are presented as lures for game hacks and free generators, indicating a social engineering attempt to trick users into visiting malicious sites. 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/479516143/how-to-get-java-minecraft-for-free-game-hack In PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/how-to-get-a-lot-of-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/easy-points-gg_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/robux-win-redeem-code-hack_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-hats-roblox-2021_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/pokemon-go-free-candy_GM1094591345.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • https://laokhwanhos.com/ckfinder/userfiles/files/hack-roblox-luq_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_off00002f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F90 22068 bytes
SHA-256: f68ac647142e7aeaead65d9679d81bb904dbcf3be5dd03bfa1c1a966d225a9f3
font_01_sfnt_off0000601f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601F 18444 bytes
SHA-256: c9d7907f94a8ada23db2a769c78fce1d5854e09f64104062867272f149f89d70

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