Malicious PDF — malware analysis report

Static analysis result for SHA-256 90a7dd6ccc243fd0…

MALICIOUS

PDF

37.6 KB Created: 2021-07-03 19:35:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6b7c4f3485f4c740fc9e0789293db07d SHA-1: 3ddd10f62a1ffbe915eb3a765153d3959d0912a7 SHA-256: 90a7dd6ccc243fd0646c00a267977fe97488b5deb33431d8a79b94f4b7f0cccc
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.tw/app/406889139/coin-master-free-spins-link-no-verification-2021-game-hack PDF link annotation
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/how-to-redeem-a-roblox-card-for-free_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/hack-roblox-robux-code-de-triche_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/code-roblox-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-hacking-2021-jailbreak-roblox-100-sure_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/claim-free-robux-roblox_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/roblox-screen-recorder-free_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/how-to-hack-rpg-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/roblox-character-free-to-use_GM431946152.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.smarthealthme.com/uploaded_files/userfiles/files/free-exotic-hack-roblox-assanis_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_off00003a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A74 23228 bytes
SHA-256: 88d75aafffb6bb6636d416ec8cce1be05daa5f04405e152bf5ccbe77711fba5c
font_01_sfnt_off00006eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB0 18880 bytes
SHA-256: 959a402348cf5c915c560357ecab6e8019ade4de046d620f98c663afb78237ce

Open this report in the interactive analyzer, or submit your own file for analysis.