Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8acdafac3189134…

MALICIOUS

PDF

32.5 KB Created: 2021-07-05 02:59:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4b20ae71c4663aa2db23a312cdf5e8ce SHA-1: 0e650af32a2cc3e2864ddb7544077e0f98e8d909 SHA-256: c8acdafac31891343eb9c0523ef48804064d8a455c43ea718d9ac53b01f35c3d
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/479516143/minecraft-redeem-code-free-game-hack PDF link annotation
    • http://library.stieyapan.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/easy-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/pokemon-go-basic-vs-premium-rewards_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-roblox-2021-unlimited-codes-for-kids_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-cheat-engine-november-2021-download_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-generator-no-verification_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
font_00_sfnt_off00002d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D01 21652 bytes
SHA-256: 0326961de0a2edfa48aef50b6ab60b4683d3e379a5307d6f661a33c84a1011b3
font_01_sfnt_off00005be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE1 18432 bytes
SHA-256: e00542d8802f7f3094baa1a46dd06b8460a806b53ddd700a8fbe3f626e4c3c25

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