Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbbf34ff0078ff3…

MALICIOUS

PDF

42.8 KB Created: 2021-05-11 17:37:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5ef41e806d2033d105c14e0385c3aa1d SHA-1: 1b778f36032b008e2ad21b74a50455eb3fdb14db SHA-256: 8fbbf34ff0078ff30489462187da53e4ebdc9468bf886ff4c0f8a043e98d7f8d
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 0.9971

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/479516143/minecraft-java-edition-free-download-for-android-game-hack PDF link annotation
    • https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://www.failtesolar.com/uploaded_files/userfiles/files/free-roblox-girl-hair-not-a-model_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
stream_003_off00004b36.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B36 25420 bytes
SHA-256: bb9f020df23b039943b044128bbb555ae47c9f3e3dcb5e7b4875bfa29aa60264
font_01_sfnt_off0000842d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x842D 18572 bytes
SHA-256: 9a204aae2d2f70fc5507d3f087af5af504ec912d2153fb6fe77e4483c9eaf90f