Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41cfe0ff1cb5bc7…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 09:05:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cc0c14dd5c3b92f66ab745640252631a SHA-1: b05efc141387ff02af971ba7cdd460c10c34ed0a SHA-256: d41cfe0ff1cb5bc7cc2c7c77d9608d87dac6e7029bcd00c55c0d4779585ada8c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to game hacks and free items, specifically targeting Roblox and Minecraft players. It contains multiple embedded URLs that redirect to external sites, such as http://netcdn.tw/app/431946152/how-to-make-a-roblox-group-for-free-game-hack, which likely serve as landing pages for scams or further malware distribution. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or scam-based attack pattern.

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/431946152/how-to-make-a-roblox-group-for-free-game-hack PDF link annotation
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-2021-september_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/roblox-robort-free_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/roblox-dragon-ball-after-future-hack_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/paid-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-cloth-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/what-is-pubg-uc-carding_GM1330123889.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/free-robux-by-oints_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/proxy-site-free-robux_GM431946152.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.midrarreservations.com/uploaded_files/userfiles/files/roblox-catalog-free_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_off0000321e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321E 22708 bytes
SHA-256: 9b67bf2c8a312536a80ac21a311e49698a2e155813aaf2e54424a260c2ee1b10
font_01_sfnt_off000064a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A0 19496 bytes
SHA-256: 14cafe897e1a2f278398660849a051e886c01303fa535fd92545c6b58a09d23d

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