Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e20c1bc7a6e02e…

MALICIOUS

PDF

36.0 KB Created: 2021-07-07 05:57:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f45cdb529a8cb8f28a5c39b5477472f4 SHA-1: bd82b0e9a709eb82cfac743764a63880f10d0d94 SHA-256: 84e20c1bc7a6e02e1e3dc011cb70627b7d1b3ea0c912e85c6d3e2ecc8f102b58
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are related to game hacks, free currency, or followers, indicating a phishing or scam attempt. The presence of a 'cmd-to-hack-roblox' PDF filename and the ML classifier's high confidence score further support malicious intent. The document body itself contains a lure for free TikTok followers, directly linking to a suspicious URL.

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/835599320/free-tiktok-followers-no-human-verification-or-survey-game-hack PDF link annotation
    • http://jjpremiers.com/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/simplysarc_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-use-cmd-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://jjpremiers.com/files/dragon-ball-final-stand-hack-stat-roblox_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://jjpremiers.com/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://jjpremiers.com/files/how-to-hack-vehical-sim-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • https://www.jjpremiers.com/files/roblox-jailbreak-hack-gameplay_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/minecraft-free_GM479516143.pdfIn PDF document text
    • http://jjpremiers.com/files/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.jjpremiers.com/files/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • 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_off000033f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F5 23120 bytes
SHA-256: 218748912421c63c15e8b4b54a92b9fd2f21d71de601239700021c8537e40d7a
font_01_sfnt_off000067ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67EA 19040 bytes
SHA-256: 71a2c29614c86359ac6f9d7488c26dbde8d9137987fdabb02d1dbf8af061703e

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