Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efc9268f0dba18a…

MALICIOUS

PDF

34.2 KB Created: 2021-06-18 08:36:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c5241014f67c61c647e4691fcecf8bed SHA-1: 6d183c2d74006ba25ef6f7d0c37059bd01d7cfaf SHA-256: 6efc9268f0dba18ad9c4122f5d7fdbaa29ae77d4f7bd09ea29b0fbc3d8673e72
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/check-it-free-roblox-game-hack. This lure is designed to trick users into believing they can obtain free game currency or hacks. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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.co/app/431946152/check-it-free-roblox-game-hack In PDF document text
    • http://library.atim.ac.id/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-can-get-a-roblox-hack-gui-to-work_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hack-ing-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-do-you-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-darkness-2-cheats_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-free-hair-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/i-got-hacked-on-roblox_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_off0000307a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307A 21908 bytes
SHA-256: 64e7eccea3bba382d5de6eb6f89eb247243a0de4f6d45bf6f62163b474630c01
font_01_sfnt_off000060b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B2 19088 bytes
SHA-256: 01f661576d6854136f448389bc153999313b5f2953074cb2f5350d58082ef47f

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