Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f0fcdbf64d2a891…

MALICIOUS

PDF

45.0 KB Created: 2021-05-13 00:33:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d586a06f2c76bbd3179702f92b805a85 SHA-1: d311abc8ae9c34c3904f9733f9aeca7786786e10 SHA-256: 9f0fcdbf64d2a8913ecba63fe2e9f1592fd126dfac0056e71539ff4c1776d33b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The primary lure, 'Roblox Promo Code To Get Free Robux', directs users to 'https://netcdn.xyz/app/431946152/roblox-promo-code-to-get-free-robux-game-hack', which is associated with game hack and free item scams. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at redirecting users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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.xyz/app/431946152/roblox-promo-code-to-get-free-robux-game-hack In PDF document text
    • https://www.polyfin.de/images/coin-master-ad_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://www.polyfin.de/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.polyfin.de/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/www-free-robux_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.polyfin.de/images/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://www.polyfin.de/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47CE 25196 bytes
SHA-256: c79f46a7ab4361f66ff6980273aa35d1db7f031926d67e58658a2a1bc6d0cb25
font_01_sfnt_off00008208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8208 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off00008bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB7 18780 bytes
SHA-256: 57e6eef1fbc3af66d8c5b48d94799429ebee4b6256a60c8d2844d61f1a05fc0c

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