Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e65a289bb15a22…

MALICIOUS

PDF

33.0 KB Created: 2021-07-05 16:09:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 32ac3a6440aec95997a1e6ce3bede380 SHA-1: 816cc43ac626b0644219fcf265c91c90411d4132 SHA-256: 50e65a289bb15a22019eb5e3c38a0decc23402e74f206069db0dd9557e54028f
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/scooter-roblox-free-game-hack PDF link annotation
    • http://library.stieyapan.ac.id/repository/what-are-points-for-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/pokemon-go-free-latest-version_GM1094591345.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/get-free-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/pubg-uc-no-human-verification_GM1330123889.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/wurst-112_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/get-free-coin-master-coins_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_off00002c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1F 22052 bytes
SHA-256: f52e3227c433e353f68b72c182d9cd6de53346b2af0a9030d3d54a1a818ff563
font_01_sfnt_off00005ca4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA4 18752 bytes
SHA-256: 78dc1dbbc7e9e6f9832d89af2527ea323d2ea9363d77eda93f8a5400194f0eb6

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