Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a94eea77a59c0e8…

MALICIOUS

PDF

46.3 KB Created: 2021-05-11 08:07:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b57d94b7af43d3718d06e4569fb4f55e SHA-1: 4ddc2412fb9bde782cdd35155a3312d33189d0e6 SHA-256: 7a94eea77a59c0e8e45e5d4322c402ce5fa84072c68ad7b51c08095fa9241927
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 0.8696

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/free-roblox-accounts-with-robux-game-hack PDF link annotation
    • http://www.dcgsrl.it/images/free-robux-download_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://www.dcgsrl.it/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://www.dcgsrl.it/images/how-to-get-free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dcgsrl.it/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.dcgsrl.it/images/sites-to-get-free-robux_GM431946152.pdfIn 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_003_off0000480e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x480E 27656 bytes
SHA-256: 145f3ee3da7138992cabaa206866a0e1128c27cb74a0503626248654707cdb70
font_01_sfnt_off000087e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E0 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9191 18676 bytes
SHA-256: 4ebcf990001f3b6d5b8f187221ce9c528a6bcbfca241b55ad06a715c23028265

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