Malicious PDF — malware analysis report

Static analysis result for SHA-256 6313e1ee4cceb366…

MALICIOUS

PDF

33.5 KB Created: 2021-06-18 23:34:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 96313aec0cb5a47c4ef48d1b6bea4167 SHA-1: be3ce6ae0470e10ffa9719ba24b7413d4bffad6e SHA-256: 6313e1ee4cceb366b165e9bcdbfbb8c1b690c9a80760bdd8eea1dcf41c7ff8d8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that are identified as malicious redirectors, specifically luring users with game hack and free generator content. The primary URL, http://netcdn.co/app/431946152/how-to-hack-into-your-old-roblox-account-game-hack, is a known malicious redirector. The document body and heuristics indicate a social engineering tactic to drive users to potentially malicious websites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/how-to-hack-into-your-old-roblox-account-game-hack In PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/how-to-hack-roblox-with-lucky-patcher-2021_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/minecraft-free-online_GM479516143.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/pubg-5-uc-buy_GM1330123889.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/free-robux-codes-no-download_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/tiktokexe-free-download_GM835599320.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.vireco.net/ckfinder/userfiles/files/daily-free-spin-coin-master-link_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_off00002b6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B6A 22408 bytes
SHA-256: f86dbc93aefd9cf4e21bdfa97dc084858bb8e948437773ab0150be66669b90c9
font_01_sfnt_off00005d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1F 19400 bytes
SHA-256: a60b2ad9700d41fbf18b7be2702f5a3d4c7736c441261446ae874c9775cb19e7

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