Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e9033ef71a33c0…

MALICIOUS

PDF

45.3 KB Created: 2021-06-08 02:15:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a3327d76a84130d2d0c5f80291a3dde7 SHA-1: 23db80cbf5c8d0e471850ca9649112d02b16b458 SHA-256: 03e9033ef71a33c035d73e03126e176d3aa774d16d7d8812647d8b4d9ab2c7fb
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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.tw/app/431946152/infinite-jump-hack-roblox-game-hack PDF link annotation
    • https://www.arquetopia.org/images/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.arquetopia.org/images/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/www-roblox-tv-free-robux_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/roblox-murderer-mystery-2-cheat-codes-sason-2_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.arquetopia.org/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • https://www.arquetopia.org/images/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • https://www.arquetopia.org/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.arquetopia.org/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.arquetopia.org/images/get-robux-com_GM431946152.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
stream_004_off00004fc0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC0 25996 bytes
SHA-256: 3568817ec41bfb60d6f03c25cf8f08cff31a20e27a7c5ba6113099cacbbc4693
font_01_sfnt_off00008bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDA 19148 bytes
SHA-256: 71adf7909334b7b40e097b8329fcc3fde435b273677b4fdde1f1de8a8de54ac3

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