Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b3169f3f45fb7a3…

MALICIOUS

PDF

49.0 KB Created: 2021-05-19 02:09:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e336fc25b0e3816b5066a8a23db52511 SHA-1: 54cbe944fa4b1204ee9c618777060c7afcce8453 SHA-256: 4b3169f3f45fb7a32b373669714bd3d8001541af990ef128ae92d568ed6858db
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 0.9977

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.xyz/app/431946152/can-you-actually-get-free-robux-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/minecraft-images-free_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-can-i-get-free-robux_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_003_off0000487b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487B 38276 bytes
SHA-256: e1b38c2ba41015f36126579c3d10b08a6aa0bcfcdcc5cdcf64f500236db1f4a2
font_01_sfnt_off00009c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C40 18764 bytes
SHA-256: 47da03a4981b0a54a8018003304e59ec7e3f87382350c48cbaac3b3d81608ccf

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