Malicious PDF — malware analysis report

Static analysis result for SHA-256 e851ea82a1891980…

MALICIOUS

PDF

44.5 KB Created: 2021-05-16 10:51:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fe66438c226c9eca236d5d2496704cd1 SHA-1: d062d24f52eb6dec10861a5b9ef6f9f6a9fb1920 SHA-256: e851ea82a1891980c7a8e006be1ea0e96de77d2f0bb920ab2ebeefe1ff7af157
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs pointing to game-related hacks and cheats, and a heuristic identified a lure for recovery secrets or private keys. The presence of these elements suggests a phishing or scam attempt designed to trick users into downloading potentially malicious files or revealing sensitive information. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 4

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/431946152/free-draw-2-roblox-game-hack
    • https://hphelmet.vn/ckfinder/userfiles/files/robux-today_GM431946152.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/boost9-com-roblox-hack_GM431946152.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/bloxpage-free-robux_GM431946152.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/coin-master-hack-apk_GM406889139.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/free-robux-working_GM431946152.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/wwwcoin-master-hack-apk_GM406889139.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-tablet_GM479516143.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/free-spins-in-coin-master-without-human-verification_GM406889139.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/coin-master-spin-cheat_GM406889139.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/classic-minecraft-net-hacks_GM479516143.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/can-u-get-free-robux_GM431946152.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/how-to-make-a-roblox-group-for-free_GM431946152.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/oprewards-free-robux_GM431946152.pdf
    • https://hphelmet.vn/ckfinder/userfiles/files/how-do-you-hack-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000048ad.bin
7137eb30991d310ffc7e6d6ca0e68940fbb17a49493849bdc148da28cb18b5e3
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48AD 29536 bytes
font_01_sfnt_off00008b13.bin
1948321e46036ef7a86fce7363c42741d482fdecd1af70e946b235d8b00c49b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B13 18632 bytes