Malicious PDF — malware analysis report

Static analysis result for SHA-256 789d1f7823415a40…

MALICIOUS

PDF

51.4 KB Created: 2021-06-10 11:57:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dda9479ee4c50501466e1f116b12876c SHA-1: 777f32cea4f567c3fcf2f180260ae1c34dbf3ef0 SHA-256: 789d1f7823415a402f49c1b0cb315636e7df93676ba5f5100cd38d56e870c373
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous URLs pointing to sites offering free in-game currency and hacks, suggesting a lure for users to download further malicious content. The presence of a 'password-protected archive' heuristic indicates a common tactic to bypass security filters. While no scripts were directly extracted, the ML classifier and embedded URLs strongly suggest malicious intent, likely involving the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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.tw/app/431946152/how-to-be-a-plus-member-on-roblox-for-free-game-hack
    • http://tckontrola.hr/files/roblox-executor-free-download_GM431946152.pdf
    • http://tckontrola.hr/files/freespins-coin-master_GM406889139.pdf
    • http://tckontrola.hr/files/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://tckontrola.hr/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://tckontrola.hr/files/coin-master-links-free-spins_GM406889139.pdf
    • https://tckontrola.hr/files/free-links-coin-master_GM406889139.pdf
    • https://tckontrola.hr/files/roblox-arsenal-hacks-download_GM431946152.pdf
    • https://tckontrola.hr/files/coin-master-key-free-spin_GM406889139.pdf
    • https://tckontrola.hr/files/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • https://tckontrola.hr/files/coin-master-free-spins-8-14-2021_GM406889139.pdf
    • http://tckontrola.hr/files/free-robux-promo-codes-2021_GM431946152.pdf
    • https://tckontrola.hr/files/get-free-spins-coin-master-october-2021_GM406889139.pdf
    • http://tckontrola.hr/files/best-minecraft-hacked-client-2021_GM479516143.pdf
    • https://tckontrola.hr/files/coin-master-2021-free-spins-link-2021_GM406889139.pdf
    • https://tckontrola.hr/files/coin-master-hack-https-coinms-net_GM406889139.pdf
    • http://tckontrola.hr/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdf
    • http://tckontrola.hr/files/free-robux_GM431946152.pdf
    • https://tckontrola.hr/files/free-chest-coin-master_GM406889139.pdf
    • http://tckontrola.hr/files/tiktok-free-auto-views_GM835599320.pdf
    • http://tckontrola.hr/files/roblox-avatar-maker-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000500b.bin
084aa93634adef118d715182a323ab3f1b55bd827d3aee9c3fa16c1d2dc7bb4e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500B 31004 bytes
font_01_sfnt_off000097ea.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
pdf-font-stream PDF embedded font (sfnt) at offset 0x97EA 5696 bytes
font_02_sfnt_off0000a4fb.bin
86ce46421a05f560cf93f152c46840812795e40200bba1403780ed37a10347e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xA4FB 18864 bytes