Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cb40db88200acb0…

MALICIOUS

PDF

35.3 KB Created: 2021-06-26 05:54:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 73dce69691838470cd65ecb8018534ca SHA-1: 714d339a6a1002b2a9cb52b2cb164e59bc842b50 SHA-256: 8cb40db88200acb00a7592752f22f10cd4f23fb16ad5d8c8d89a500458e6e666
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 0.9980

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 http://netcdn.co/app/431946152/easy-free-robux-hack-2021-game-hack PDF link annotation
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/get-follower-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-money-roblox-rocitizens_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/best-site-for-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/robux-download_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/hack-roblox-lumber-tycoon-2-money_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/hack-dragon-ball-rage-for-roblox-danload_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/unlimited-robux-hack-no-survey_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/roblox-free-download-uptodown_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/roblox-times-table-1-reasesen-56-friv-free_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/not-a-scamhow-to-get-free-1k-robux_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/how-to-geht-free-robux-no-human_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/how-to-hack-a-megavore-in-dino-sim-roblox_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-2021_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
font_00_sfnt_off00003102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3102 22584 bytes
SHA-256: c838fafe2b4391f8da77c93ba962af94b45f30eaa072844e10d5b7123f7be8e3
font_01_sfnt_off00006398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6398 19468 bytes
SHA-256: 82ce14c0ca0d39bb8326e684bb88f04069251f52192f0a927cce072c35f217d9

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