Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a7422765216663d…

MALICIOUS

PDF

49.8 KB Created: 2021-05-11 12:29:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 40802c64bd1e7f1c74c748ee15ad175f SHA-1: bea52a4028d51bf04df79df9493b079cd45a9601 SHA-256: 3a7422765216663d6cea402fd90fa5c5a4322d59674fc4f6a88fc8e03a159408
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 0.9979

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-robux-apps-that-work-game-hack PDF link annotation
    • http://sagrasantacroce.it/images/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://sagrasantacroce.it/images/how-to-get-coin-master-free-spins-in-email_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://sagrasantacroce.it/images/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/how-do-i-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://sagrasantacroce.it/images/hack-coin-master-2021-pc_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
stream_003_off00004a91.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A91 38156 bytes
SHA-256: 3f3a62caca1467c535a25ce6c4a10486fdd8e1141c2939ecfec2494efed46a6b
font_01_sfnt_off00009ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EBE 19056 bytes
SHA-256: 867cc7ed7a05e00a705c8433c5324c57a550f7e7678a2e8c50298e1974253cec

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