Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f933689b9906237…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 18:26:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f0e371d419f0ec7849dfb9eb5370f3b7 SHA-1: c61faf2d5ec91ce11ad95f5b70964c9c853d08f3 SHA-256: 5f933689b9906237beed7ba701db3bcfbcf7d0f9ffe6ee85a01d7303f084b9ce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting "free Robux" and "game hacks". The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to the malicious URL and other potentially related lures. The primary attack pattern involves social engineering to trick users into visiting a malicious site, likely to deliver a secondary payload or conduct further phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/431946152/rbx-free-robux-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/wurst-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005121.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5121 24268 bytes
SHA-256: de2a80df8de4be9606c7fb2bd311e6a666458053655b13d10f3e2d3a44d528b4
font_01_sfnt_off0000888f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x888F 2824 bytes
SHA-256: 1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189
font_02_sfnt_off0000923c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x923C 18012 bytes
SHA-256: 03f7603bc8a5695bbd0c39958af3fcfd5a932cbc13eba7563a8e8ca8b5ca4208

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