Malicious PDF — malware analysis report

Static analysis result for SHA-256 860d42d1e1865b12…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 20:34:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 020cece0395e0c751208b9f9d6f0a689 SHA-1: c862a5ffb442ce2e404cff240237e4d3e48b01a8 SHA-256: 860d42d1e1865b12de9d6d99cbc68e5702a0c3f51e6c89ac90e4137496ba5996
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector pointing to 'free-robux-easy-game-hack'. This lure, combined with the 'ML_NYX_PDF_MALICIOUS' heuristic, strongly suggests a phishing or scam attempt. The document body, though partially corrupted, contains text related to free Robux and a URL, reinforcing the lure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/free-robux-easy-game-hack In PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/pubg-74-uc_GM1330123889.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • https://www.denpasarinstitute.com/new/public/ckfinder/userfiles/files/how-to-hack-and-get-free-robux_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
stream_004_off00005509.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5509 25608 bytes
SHA-256: 67fbfc63e079ad011b45eb99b9024744600d3828e59aa4bb37ca0d8c126c2c3d
font_01_sfnt_off00008f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F9B 18420 bytes
SHA-256: 93fb4fe90c413bceeeea5373daaca89ae05c83417e443247d622c1bd09cfd34e

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