Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1bc4bfb8ddad675…

MALICIOUS

PDF

33.3 KB Created: 2021-06-18 06:15:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 891c5a78172f8f0e7dc760c33468c4a6 SHA-1: 0afda13027c6de52b3ebd3a26e8056b0e4cfe80e SHA-256: f1bc4bfb8ddad675808e140aee42f3d0e1b89b3a53174b6f74a5f158945d3f26
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and lures related to game hacks and free in-game currency, such as 'Roblox Free Roblox Codes' and 'free robux'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. The ML classifier also flagged the PDF with high confidence. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-free-roblox-codes-game-hack PDF link annotation
    • http://atmos-service.com/images/pubg-uc-or-g_GM1330123889.pdfIn PDF document text
    • http://atmos-service.com/images/get-free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://atmos-service.com/images/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://atmos-service.com/images/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/roblox-free-1m-robux_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/hack-roblox-using-artmoney_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/big-brother-hack-roblox_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/minecraft-free_GM479516143.pdfIn PDF document text
    • http://atmos-service.com/images/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://atmos-service.com/images/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://atmos-service.com/images/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/free-tiktok-accounts-with-followers_GM835599320.pdfIn PDF document text
    • http://atmos-service.com/images/free-robux-apps-that-work_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_off00002c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C86 22396 bytes
SHA-256: 54b8ae479d13adcba366c5af6748f2932cd38d2570713505e3d26f96ccfec2e2
font_01_sfnt_off00005e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E35 18640 bytes
SHA-256: d6e84cfbe8ec4bfe5e25d34ea01463fef4d1fcbd041ceeb2ea4c82d149e0ee80

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