Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b6585d8897cdd47…

MALICIOUS

PDF

40.6 KB Created: 2021-05-10 13:51:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 32b403f1990ca9bd9971f32e68835a9a SHA-1: 00fef406a8efc5bd73a522bce767adec10381ced SHA-256: 3b6585d8897cdd47fa41f226b8b25a90e7b4c664632286bf2a093d7f0a5a78bf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure. The embedded URLs, such as 'https://netcdn.xyz/app/406889139/hack-coin-master-spin-android-game-hack', reinforce this theme. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9117

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/hack-coin-master-spin-android-game-hack PDF link annotation
    • https://kalendarite.eu/images/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://kalendarite.eu/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://kalendarite.eu/images/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://kalendarite.eu/images/how-to-get-free-robux-by-playing-games_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_off00003acf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3ACF 24692 bytes
SHA-256: 636bcd72dffa7345a0bbc0e8dc0ff1f5b1c76b4df0a9770835f93886e51e4120
font_01_sfnt_off00007360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7360 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4A 18068 bytes
SHA-256: 1ed1c134697499a64800fff091906e8fba4251740a5710e312219489406905e8

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