Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4de7f40e561997…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 11:45:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f3cf4d5597c6c8defeced4298c05bb6a SHA-1: 9a010ddddab9e69577a6583ca3ccad064cf488cf SHA-256: ce4de7f40e561997efaa18a09e1fc17aa7045b7a832e2121e99fe5454a86ba6b
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 0.9971

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/bux-life-free-robux-game-hack PDF link annotation
    • http://lib.unar.ac.id/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/hack-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • https://www.communes.comIn 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_off000049b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B1 25228 bytes
SHA-256: 0b7e0dddcfcc21a244983b525df7026b5081c1dc26e6406aa04713fa30d7aad4
font_01_sfnt_off000083e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E4 18136 bytes
SHA-256: 29dc967668ee0d992c179c4e94ca6f9cb219d50b5ccf800f63d20fdab69e699e

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