Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4269929d9b84349…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 12:06:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b8abeacdcffb92762cea15424439d563 SHA-1: b6da109b1b38150ca18dde511bbb16b194a3b006 SHA-256: a4269929d9b843496f934e90936ac22fcfcf153efdd6341a0cc624ab31ee47c8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains embedded URLs and text that strongly suggest a social engineering lure for downloading game hacks or cheats. The ML classifier also flagged this PDF as malicious with high confidence. The presence of URLs like 'http://netcdn.tw/app/406889139/coinmasterfree-game-hack' indicates an attempt to redirect the user to a malicious download site. No scripts were extracted, but the document structure and URLs point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/coinmasterfree-game-hack
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/how-do-i-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/free-coin-master-spin-and-coin-link_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/hack-mad-city-roblox_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/free-robux-giving-group_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/coin-master-free-spin-now_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/free-bc-roblox-accounts-2021_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/how-to-hack-money-in-roblox-2021_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/daily-spin_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/free-roblox-troll-outfits_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/roblox-free-no-download_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/free-robux-net_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/hacks-of-roblox-for-cmds_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/free-coins-and-spins-link-for-coin-master_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/pokemon-go-free-and-defit_GM1094591345.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/coin-master-new-link-free-spin_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/hack-meep-city-roblox_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/how-to-hack-your-friends-in-roblox_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/get-free-spins-on-coin-master-2021_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpust
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033b4.bin
53c070a765fce4c3385c61234ac65196f9ca76919334191b7b887841c4811c7e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B4 23008 bytes
font_01_sfnt_off0000671d.bin
e3b824c700fc1afb9be61c0fda879df8bb3fefe3698910b387f7b25b5267b414		 pdf-font-stream PDF embedded font (sfnt) at offset 0x671D 18092 bytes

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