Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f5989d75ab1899f…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 10:43:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c12f975e995838a322d83a37f4844c96 SHA-1: 2ee288be4d2dbe758aa2ceb403fa7e982b385965 SHA-256: 5f5989d75ab1899f12df23ece934ddba6abfe4447bad739c911f1af1a6997d6e
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 'free Robux generators' for games like Roblox. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

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/bloxpage-free-robux-game-hack In PDF document text
    • https://www.taline.hr/files/is-there-any-way-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • https://www.taline.hr/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/gainbux-gain-free-robux_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/roblox-hacks-builders-club-free_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/free-robux-pc-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/open-coin-master_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/how-to-hack-people-on-roblox-easy-exploit_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.taline.hr/files/how-to-get-robux-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.taline.hr/files/300-free-spins-coin-master_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_off00002e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7B 22368 bytes
SHA-256: ec272cf654bc2bc5282238f23887d6324e43d264dbe1b4aa763555e1eca29593
font_01_sfnt_off0000604c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604C 18968 bytes
SHA-256: 1b5123001528eb502e32e1473b5fef90b38f1688b53074051a1ff9b6b67f8f5e