Malicious PDF — malware analysis report

Static analysis result for SHA-256 65cbf62a92253e56…

MALICIOUS

PDF

41.8 KB Created: 2021-05-14 22:45:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1b8461ca3b4f30497237fa5a506fc99e SHA-1: 274ee54f38e16a6e2ff7627e6fb45300ed68acf9 SHA-256: 65cbf62a92253e56d13fe22ec7bdd3f697cac0a834a07cf6b664d4a7ce41d13c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/479516143/how-to-get-minecraft-realms-for-free-game-hack PDF link annotation
    • http://fmbompastor.com.br/images/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/roblox-but_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_off00004833.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4833 25120 bytes
SHA-256: bcbd1214a5e0998cf0ff32bd653719abb12519ca230b8255072d6b6a8e881774
font_01_sfnt_off0000815d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815D 18208 bytes
SHA-256: e7f5766237207d24130a790e1d2d61f15d85f871af5599da5b7787abafcff996

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