Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8b5af0e1c682818…

MALICIOUS

PDF

34.0 KB Created: 2021-06-20 17:18:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c28e2df5410b48c0c2546b58262396f5 SHA-1: a76e3d39c578b98ebbad4d01d876f9fe0b6c4109 SHA-256: c8b5af0e1c6828184e11d398ae296a88f1cb0d38fd9affb45d605b2ba87c8718
160 Risk Score

Malware Insights

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

This PDF document contains multiple links designed to lure users into downloading potentially malicious files, disguised as game hacks or free currency generators. The primary malicious link directs to 'http://netcdn.co/app/431946152/hacked-roblox-app-ios-game-hack', which is flagged as a known malicious redirector. The document's structure and embedded links strongly suggest an attempt to exploit user interest in popular games to deliver malware.

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/hacked-roblox-app-ios-game-hack In PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/tiktok-free-wallpapers_GM835599320.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/free-robux-update_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://olimpik.mk/imagescke/upload/files/roblox-fly-hack_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_off00002f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F31 21996 bytes
SHA-256: 4b438a2d45b2e0949d9c438b3eab5c26428f39ded0c2ae3aaffef621448f9ef1
font_01_sfnt_off00005fa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA2 19008 bytes
SHA-256: 299278181988e386d5d04d247b148c2bb5cdf0cdcb98cbd4f28007f27d5bfe17

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