Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f674cd8b965707…

MALICIOUS

PDF

42.0 KB Created: 2021-05-15 12:39:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7e50ff681d4b4e0e8f61d32d429db299 SHA-1: 4e4ae7a4b57b67dcd00c7b5d6ad6ed4b0d282938 SHA-256: d4f674cd8b965707be921ca317e64deaf6a8dd60f5284604a22275acf1076f1d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a 'free generator / game hack' lure, directing users to a suspicious URL. The document body also contains this URL, reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/free-robux-2021-no-verification-game-hack PDF link annotation
    • http://www.ma-plast.hr/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-robux-site_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-robux-master_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • https://www.ma-plast.hr/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-free-attack-link_GM406889139.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_off000043ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43AD 25696 bytes
SHA-256: 79eecfaed8d71c867e96ebcb88797910c8895195eaa547b180420f4b24700cb0
font_01_sfnt_off00007f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F41 19004 bytes
SHA-256: 66494d2150ad1cf2ec2ec7771a558690eaf6f54b49f1e3390ebbe78937767b49

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