Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3348d9f793f898d…

MALICIOUS

PDF

47.9 KB Created: 2021-06-03 10:26:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b7f2f08142add3d6955a02c4219f2834 SHA-1: 8e881c37e3c9b88ca5d0b03fa1da381cc896fd09 SHA-256: c3348d9f793f898d0f7fbc752a3072c3dce9af537bc1afdf5c8f608b64cb57be
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 0.9796

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.online/app/406889139/coin-master-free-daily-spins-link-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/what-is-the-fastest-way-to-get-xp-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/10-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hack-2021_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_004_off00005233.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5233 26344 bytes
SHA-256: c5189927e21931f8b66840f0cc708204751079147f690c19b00781d7700dd26b
font_01_sfnt_off00008df8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF8 2920 bytes
SHA-256: 64c53edae7920bc04119553d13e7f88c7ab8c9d6abd0f5e62be35afdb33f76ff
font_02_sfnt_off00009813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9813 18476 bytes
SHA-256: 219409e4a96e727ac7d03afbf10b928993c8ec078f24206d8d8724722cb954a1

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