Malicious PDF — malware analysis report

Static analysis result for SHA-256 d61670737560c66c…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 05:42:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b45f1caaa0dc8f9b89ad4c0c70f1733b SHA-1: cddb755aa000a2e3e3a5f398348cdb8ea432090e SHA-256: d61670737560c66ced04fb897aa278d3768c8e8a867d39881a48fccda5a31a52
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple external links, including one specifically identified as a lure for game hacks and generators. The ML classifier also flagged this PDF as malicious. These findings suggest the document is designed to trick users into visiting malicious websites, likely for phishing or to download further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/free-coins-on-coin-master-game-hack PDF link annotation
    • http://opac.stiesa.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-lv6-free-trial_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-add-robux-to-used-roblox-card-cheat_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_004_off00004e64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E64 24780 bytes
SHA-256: a534c826e0b007b5526e0258df5d930eed97d0e79ac8576ecb058db5cabb7dfc
font_01_sfnt_off00008757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8757 17712 bytes
SHA-256: 6ea46f87f2167b805a87cbef3ad9b5ecf4d2513d7b8c5fe933be1d22f28e2546

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