Malicious PDF — malware analysis report

Static analysis result for SHA-256 e074f948a8569751…

MALICIOUS

PDF

35.3 KB Created: 2021-07-07 17:55:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0b805d742b6aed37418ca51e81a201a3 SHA-1: 4df11d2b7d14f6050dfc03412833e7cf3021c003 SHA-256: e074f948a85697510f73c0abaa53dc85b1afa30343bf41a88f33173f7e950eae
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 0.9981

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-spin-link-today-2021-game-hack PDF link annotation
    • https://www.thekukkad.com/uploaded_files/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/real-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/cheat-roblox-mod-menu_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/roblox-live-stream-free-robux_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/free-roblox-games-like-bloxburg_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_002_off00003219.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3219 22588 bytes
SHA-256: 8d4067e344a944476d8361848a7f3de9b3b5c2fa6ca7d39a2d518b6b3928b322
font_01_sfnt_off0000648d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648D 19100 bytes
SHA-256: 87948dd456158924639af78db2b6f448ba4bec773812a2cc2fa62bc058a3e5dd