Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb811cdeee398704…

MALICIOUS

PDF

33.6 KB Created: 2021-07-08 18:52:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 618cab9cb0fbff4eecebe6ef91a1f431 SHA-1: 6cfb4efe1b979fe9b6a7a7e81f34b93a09000b0d SHA-256: bb811cdeee398704af64a6c1b90f87fd2afc3b03a2dbe85168e7efa81fff5f70
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/roblox-hackers-list-game-hack. This redirector is likely used to deliver a second-stage payload or phish for user credentials. The document body and heuristics indicate a lure related to game hacks and free in-game currency, consistent with social engineering tactics to entice users to click malicious links. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/roblox-hackers-list-game-hack In PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/free-animation-roblox-june_GM431946152.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/free-tiktok-fans-hack_GM835599320.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/undertale-survive-the-monster-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/top-10-los-mejores-hack-de-roblox_GM431946152.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/how-to-get-free-5-robux_GM431946152.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/robux-hack-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_off00002c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C54 22616 bytes
SHA-256: aa466cd0dbdc21d72de63754c8aa785dde8c8a13bed03bfdd56c609ebd5a1ddb
font_01_sfnt_off00005edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDF 18880 bytes
SHA-256: 5eb0e8b2f57bc78df8f8d9e5f4bfd6a7e1b2782f5ed4f924231d74570580066d