Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d58dcb4f8ed2f5…

MALICIOUS

PDF

228.5 KB Created: 2021-07-03 17:50:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 019fa033b7739e5899a20817f93584ed SHA-1: 78187812bd0a7fe7487c2eb180236632d0447ca8 SHA-256: 16d58dcb4f8ed2f56f553da9c7aac940854aef1b4f1749b658987291e275d60d
132 Risk Score

Malware Insights

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

The document employs social engineering tactics by presenting a fake CAPTCHA and a lure for game hacks to trick users into downloading further malicious content. It also suggests installing browser extensions or updates, a common method for malware installation and credential theft. The presence of multiple URLs pointing to potentially malicious downloads reinforces this attack pattern.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 6

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/1094591345/pokemon-go-free-643-game-hack
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/how-to-get-free-robux-no-verification_GM431946152.pdf
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/coin-master-hack-tool-india_GM406889139.pdf
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/minecraft-pocket-edition-free-download_GM479516143.pdf
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/how-to-hack-coin-master_GM406889139.pdf
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/free-robux-generator-download-2021_GM431946152.pdf
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/get-free-robux-without-human-verification_GM431946152.pdf
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdf
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdf
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/hack-de-matar-gente-roblox_GM431946152.pdf
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/every-roblox-item-free_GM431946152.pdf
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/berby-novedades-free-robux-2021_GM431946152.pdf
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/roblox-guess-that-character-for-free-robux_GM431946152.pdf
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/roblox-urbis-level-hack_GM431946152.pdf
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/free-roblox-printables_GM431946152.pdf
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/martian-lettuce-coin-master-free_GM406889139.pdf
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/coin-master-free-spins-today-39_GM406889139.pdf
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdf
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdf
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/getrobux-ninja_GM431946152.pdf
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/dominus-hats-roblox-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off000325a5.bin
71a10ff406292e16bbc768009649eaf8538b3508b67fa546ee066bb25ee2da18		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x325A5 25728 bytes
font_01_sfnt_off000361d9.bin
012f92c5760f70a2d22421306c1d4a17a3a03515f3ed7177754691022c66dfb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x361D9 18760 bytes

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