Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7399609c79193af…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 08:03:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a83e42b4a41f9416cf7683112192dc88 SHA-1: bceca57bb751e9c26ed44895706e40ed25624061 SHA-256: d7399609c79193afa3f50b5c6564255121042b0aeff502febb660efdc1299630
160 Risk Score

Malware Insights

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

This PDF document contains multiple links pointing to known malicious redirector infrastructure, specifically targeting users with lures related to 'game hacks' and 'free robux'. The ML classifier strongly flagged this sample as malicious. The embedded URLs are designed to lead users to potentially harmful content or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/roblox-admin-hack-gui-game-hack In PDF document text
    • https://lib.stie-yai.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/5-easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-coins_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-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_off00004f83.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F83 26276 bytes
SHA-256: 0a53e4ece8e87e026b614b8b24de2831037bd7b180f7178de9382338d6861d91
font_01_sfnt_off00008c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0E 18876 bytes
SHA-256: dd8c242369c3070e1dad5532225e13df78b1009bc00350af4b5694fb3d29af59

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