Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e8880c43989874…

MALICIOUS

PDF

45.1 KB Created: 2021-05-14 03:28:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f6b652b2dbdf69c03e92a1cab8230b35 SHA-1: 63ab8f21c805eae5d331aea1cf7a11732236a73e SHA-256: 36e8880c43989874bd18966bd07343a0782339293d7ebefbe89e0c78cac3b9ad
122 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a malicious lure, including a fake CAPTCHA and a visual download button, designed to trick users into downloading further malware. The presence of numerous embedded URLs pointing to game hacks and cheats suggests a social engineering tactic to entice users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

Heuristics 5

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/479516143/minecraft-mac-free-game-hack
    • http://properteez.com/images/coin-master-spin-hack-2021_GM406889139.pdf
    • http://properteez.com/images/coin-master-hack-without-verification_GM406889139.pdf
    • http://properteez.com/images/moonactive-free-spins-2021_GM406889139.pdf
    • http://properteez.com/images/ultimate-free-spins-coin-master_GM406889139.pdf
    • http://properteez.com/images/free-coin-master-spins-2021_GM406889139.pdf
    • http://properteez.com/images/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://properteez.com/images/free-gold-cards-for-coin-master_GM406889139.pdf
    • http://properteez.com/images/coin-master-hack-2021-without-verification_GM406889139.pdf
    • http://properteez.com/images/coin-master-free-spin-today_GM406889139.pdf
    • http://properteez.com/images/robuxglobalcom_GM431946152.pdf
    • http://properteez.com/images/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://properteez.com/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://properteez.com/images/coin-master-free-spin-bonus_GM406889139.pdf
    • http://properteez.com/images/free-robux-com-2021_GM431946152.pdf
    • http://properteez.com/images/blox-fish-free-robux_GM431946152.pdf
    • http://properteez.com/images/coin-master-35-13-hack-download_GM406889139.pdf
    • http://properteez.com/images/simplysarc_GM479516143.pdf
    • http://properteez.com/images/minecraft-pe-hacks_GM479516143.pdf
    • http://properteez.com/images/easy-robux-generator_GM431946152.pdf
    • http://properteez.com/images/coin-master-free-spins-link-quora_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c09.bin
41a99afa87ad72621572bf667bc15a22f09132aeb567a425758aa66ef6954918		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C09 25408 bytes
font_01_sfnt_off00008628.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8628 2880 bytes
font_02_sfnt_off00009013.bin
2778e064ee8e4e3a4bd3984a17bb7eaaeefaa41a67eb131b8ade69fe1653bbfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9013 17568 bytes

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