Malicious PDF — malware analysis report

Static analysis result for SHA-256 1803d08d7e792f85…

MALICIOUS

PDF

45.0 KB Created: 2021-05-12 15:34:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 914e5d94739e88b74dde1bd6623b77dd SHA-1: 377a66f76cc543b95023cc99268b3aa8d5f56c61 SHA-256: 1803d08d7e792f853fb852fac70c83dc5f23d755b3343cf795b3e4c9f58f52b0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains a lure for free in-game currency, specifically mentioning Roblox and Coin Master, and includes a high-confidence ML classification for maliciousness. The embedded URL points to a domain associated with such lures. The presence of a 'password-protected archive handoff' heuristic suggests a multi-stage attack where this PDF might be a precursor to delivering a more dangerous payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-to-get-roblox-credit-for-free-game-hack
    • http://www.sabbiadoro.net/images/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://www.sabbiadoro.net/images/coin-master-hack-without-verification_GM406889139.pdf
    • http://www.sabbiadoro.net/images/coin-master-free-daily-spins-link-2021_GM406889139.pdf
    • http://www.sabbiadoro.net/images/instagram-free-coin-master-spins_GM406889139.pdf
    • http://www.sabbiadoro.net/images/coin-master-hack-spins-apk-download_GM406889139.pdf
    • http://www.sabbiadoro.net/images/rewards-roblox-com_GM431946152.pdf
    • http://www.sabbiadoro.net/images/coin-master-free-food-for-pet_GM406889139.pdf
    • http://www.sabbiadoro.net/images/coin-mast-hacks_GM406889139.pdf
    • http://www.sabbiadoro.net/images/free-robux-not-a-scam_GM431946152.pdf
    • http://www.sabbiadoro.net/images/coin-master-gold-cards-free_GM406889139.pdf
    • http://www.sabbiadoro.net/images/minecraft-windows-10-free-with-java_GM479516143.pdf
    • http://www.sabbiadoro.net/images/bux-gg-robux-free_GM431946152.pdf
    • http://www.sabbiadoro.net/images/roblox-comcom_GM431946152.pdf
    • http://www.sabbiadoro.net/images/coin-master-links-to-free-spins_GM406889139.pdf
    • http://www.sabbiadoro.net/images/free-robux-without-downloading-anything_GM431946152.pdf
    • http://www.sabbiadoro.net/images/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdf
    • http://www.sabbiadoro.net/images/coin-master-free-spins-for-today_GM406889139.pdf
    • http://www.sabbiadoro.net/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • http://www.sabbiadoro.net/images/roblox-scam_GM431946152.pdf
    • http://www.sabbiadoro.net/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a7f.bin
6e701e12b9d8d6730bffec2b645e98ea1efdaa5c1225c3513e10280a4d2be942
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7F 24748 bytes
font_01_sfnt_off000082ae.bin
baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
pdf-font-stream PDF embedded font (sfnt) at offset 0x82AE 2844 bytes
font_02_sfnt_off00008c6f.bin
aaee93be15afea3f34265028f72e14c8d8177a28a7e511fa9958eeec3e94f784
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6F 18508 bytes