Malicious PDF — malware analysis report

Static analysis result for SHA-256 612d922457f0ecd4…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 15:52:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5c176fe73c81d08eb8c404475150d8cf SHA-1: 6fea5051467863c683b049a49523d8e59e18c7fc SHA-256: 612d922457f0ecd46768336658951db7427985ad0a9bd3316e204d8406ac8913
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs, with one specifically identified as a malicious redirector. The document body and heuristics indicate a lure for game hacks and free items, likely leading users to a malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to exploit user interest in free in-game items to redirect them to harmful content.

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/431946152/roblox-anti-crash-hack-game-hack In PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-pet-simulator-dominus-huge-hack_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-roblox-gift-card-codes-generator-online_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/hack-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-pastebin-no-save_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/www-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-do-you-get-free-shirts-on-roblox-group-2021_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/roblox-hacks-phantom-forces-2021-regedit_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-mircosoft-rewards_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/fly-hack-roblox-no-cheat-engine_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/cheat-rocket-roblox_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-hack-a-roblox-account-2021-easy_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/free-robux-command_GM431946152.pdfIn PDF document text
    • https://i-tech.ac.id/perpus/repository/how-to-put-free-admin-on-a-roblox-game_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_002_off00002f8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F8A 22448 bytes
SHA-256: 38e7c950c2610cc08b57393b5b404ba2f4da29c3b83133e6b953f77240e66aec
font_01_sfnt_off00006152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6152 19044 bytes
SHA-256: 0767ccf4de9cb486e6b92f9b88fc102e2b4fef270d198be2b2b2951f01909a7e

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