Malicious PDF — malware analysis report

Static analysis result for SHA-256 134d1d2d4b93cfc1…

MALICIOUS

PDF

32.3 KB Created: 2021-07-05 19:20:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 51fd515fcca9a29c8d604b7af44a6910 SHA-1: 227307e64ea32dbb8d2c751653fde69a3506dd6e SHA-256: 134d1d2d4b93cfc1a994777e006ee32089e2d32570aefc7ca65ea8e47c9596df
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 0.9824

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.tw/app/431946152/free-roblox-cad-codes-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-candy-van-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-vip-gamepass-free-script_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-pinewood-hack-script_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-prison-life-swat-gear-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/retail-tycoon-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-robux-hack-really-works_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/daily-coin-master-free-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
font_00_sfnt_off00002abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABE 21720 bytes
SHA-256: d313ab7c140e3c38211cd5b93a90f5fef450a17de253f8b4beb348ac3ec917aa
font_01_sfnt_off00005ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB9 18640 bytes
SHA-256: 9906c2d0278cbfb5d14a8444e32cfc41851c586c999042614b30aab48f3f4034

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