Malicious PDF — malware analysis report

Static analysis result for SHA-256 f457629299b82a5c…

MALICIOUS

PDF

33.5 KB Created: 2021-07-05 08:20:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2e29ad0e5587368dedebb1b60cad5a97 SHA-1: 66c95653af01f4e6d0408adbc0c9e98b15befbc2 SHA-256: f457629299b82a5c0b6f894cb3cb9db4338c8a04bc2f7a185ec5208e868a2441
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 0.9980

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.tw/app/431946152/free-robux-redeem-codes-game-hack PDF link annotation
    • http://chem.ipb.ac.id/kim/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/can-you-make-a-roblox-game-for-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/truco-2021-hack-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-hack-scripts-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-download-synapse-roblox-hack_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-hack-roblox-pc_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-mod-apk-free-download_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_off00002e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E40 21588 bytes
SHA-256: c0396418bf7a93ff3ab9a4ea179f6a895aaedc874bfabfbfe99f71a1af929351
font_01_sfnt_off00005d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D84 19152 bytes
SHA-256: 2beb9c583ef49ea143b974913017cf2f00d835df8237c6c52447211218059ebd

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