Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bf5ee8c1a798755…

MALICIOUS

PDF

34.6 KB Created: 2021-06-28 21:47:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 434ae8720292646e7325f59f897e3445 SHA-1: d3b53a92c814ba8f28449c99f4902b3dd69f3e9a SHA-256: 1bf5ee8c1a798755234a50ae514805f10f6e6f4228ec44a70d8929bbd22aa331
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically targeting users with lures related to game hacks and generators. The embedded URL, http://netcdn.co/app/431946152/royalty-free-music-one-roblox-game-hack, is identified as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to redirect users to a potentially harmful site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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/royalty-free-music-one-roblox-game-hack In PDF document text
    • https://www.cinemapalace.ro/trailer/files/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/roblox-when-i-make-game-it-say-free-sign_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/hack-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-hack-roblox-ac-counts_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/get-free-robux-everyday_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-spin-hack-app_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-hack-roblox-2021-march_GM431946152.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://www.cinemapalace.ro/trailer/files/how-to-hack-an-account-on-roblox-2021_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_off00002e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E66 22548 bytes
SHA-256: bd19b67aab0498ad82507f934b0da1d76e7a004b356a4e45fed5c9b56107438b
font_01_sfnt_off0000611d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611D 19388 bytes
SHA-256: 2f0278f4027233ea1b69a25e981524d7a5f0acca793b3a869918daea6e9ee54a

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