Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa429e1904e1dc74…

MALICIOUS

PDF

52.7 KB Created: 2021-06-11 07:03:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 32ce67a425c40b96895f20cae9b8a084 SHA-1: a98144c081e601c94daf91e2c5f8c30ed038644c SHA-256: aa429e1904e1dc74e2ba69b14ac594af1aaf9cdd37804e98e52f3b8629bbaeaa
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 0.9614

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.tw/app/431946152/roblox-unlimited-robux-hack-no-download-game-hack PDF link annotation
    • http://library.patria-artha.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-robux-free-and-easy_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/proxy-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/infinite-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-mod-version-free-download-ios_GM406889139.pdfIn PDF document text
    • https://www.nrzroblox.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52E1 29772 bytes
SHA-256: eb804bf6b86101b6e8596785f92785da04352b21feb16412d93f4e7462a779ac
font_01_sfnt_off0000963b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x963B 5276 bytes
SHA-256: b3f83386cdac9b018fd40e2aecf5a5dc499a7c2c1551e39387fc40fb675ae59a
font_02_sfnt_off0000a7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7DE 19500 bytes
SHA-256: 0e024ef9f7268e8eeeadaa9f27d34027e4fdf450a1ea328fbbe304832d5d2757

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