Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b0e66a8bc2cdf5…

MALICIOUS

PDF

44.0 KB Created: 2021-05-17 09:32:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ca722d6b65ba4b968940be301a11a515 SHA-1: fc2f2dfa684b8a666bb9c15b526f939b795cfbfd SHA-256: a8b0e66a8bc2cdf5a4162f04f87ce9b246e3a46673a5d9a888e4e3d68ddc65b2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The heuristic firings confirm these links point to known malicious redirectors and a lure for game-related cheats. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/406889139/coin-master-free-cards-link-2021-game-hack In PDF document text
    • https://amiranet.com.br/files/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/114-4-hacks_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/blox-best-robux_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/robux-converter_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/earn-robux-online_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • https://amiranet.com.br/files/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/hack-avatar_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://amiranet.com.br/files/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/rbx-claim_GM431946152.pdfIn PDF document text
    • https://amiranet.com.br/files/files/how-to-earn-free-robux_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
stream_003_off0000496b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496B 28728 bytes
SHA-256: 8416e0513ae8c9456b055a50c6d4aaff95e80f512658122456a21c179f5c09e6
font_01_sfnt_off00008951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8951 18456 bytes
SHA-256: b51790488d60a3c79421cfddad0a6ae9f074b26b8d27a704dda1d2d7bad48ec0