Malicious PDF — malware analysis report

Static analysis result for SHA-256 c816b5e921bc9e80…

MALICIOUS

PDF

34.2 KB Created: 2021-06-27 06:13:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2788bd507c3200e3280eee6d6f383959 SHA-1: 82ce19043d6c1ddccdd778d9a8580165ebc0ba33 SHA-256: c816b5e921bc9e801f7af489455d18f1da3e299d98804210670ab71a1bcb0a64
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and cheats. The primary link, http://netcdn.co/app/431946152/cheat-roblox-kick-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely as a lure for further malware delivery or phishing.

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/cheat-roblox-kick-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-cheat-engine-bypass-2021-super-power-training_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/best-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/pubg-uc-myanmar_GM1330123889.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/cheat-in-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-no-verification-needed_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_off00002e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E78 22540 bytes
SHA-256: 1e67dac676ef62b8d6dccb39aca5edb1ae74f13c463f1504f17f2824f8fd0eea
font_01_sfnt_off000060b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B7 19044 bytes
SHA-256: a0dc640948af92e4bdc697df9c1d5a488191feae328e0baf5182c8181934fb1d

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