Malicious PDF — malware analysis report

Static analysis result for SHA-256 438c782d2543326a…

MALICIOUS

PDF

34.9 KB Created: 2021-06-19 21:36:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 010964d14110f334ef4d1b4d9fd55763 SHA-1: a003ed4f4f2c3bcfd61c9e50ac7a450fd39d4e6c SHA-256: 438c782d2543326adcb3738d0b9f9e338f0e75ff7196951e964d91e99d2e6e5f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs and references to game cheats and hacks, strongly suggesting a phishing or malware distribution lure. The heuristic 'SE_LOLBIN_RUN_COMMAND' indicates the presence of command-line execution indicators within the document text, potentially related to downloading or executing further payloads. The ML classifier also flagged this PDF as malicious with high confidence.

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.co/app/431946152/eclicktp-roblox-hack-working-game-hack PDF link annotation
    • http://perpus.polimarim.online/repository/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/oginject-co_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/christophsis-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/tiktok-free-98_GM835599320.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-robux-without-downloading_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-fidget-spinner-free-games_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-hack-roblox-accounts-2021-using-cmd_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-free-play-no-download-games_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-hacking-accounts-with-audio_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-20219-robux-hack-versao-2390202159_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repositorIn macro / runtime command snippet
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3048 22432 bytes
SHA-256: b9546c4d60773845d2ec44a2f39b734c57e84d6528c03cec76a28078883d79b9
font_01_sfnt_off00006282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6282 19256 bytes
SHA-256: 27c0c4bca42107a7a01d70f6d1b3ec729d0d3c0408b992ef5ccf03a49ee24c8b

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