Malicious PDF — malware analysis report

Static analysis result for SHA-256 80bb000a0c87dac2…

MALICIOUS

PDF

44.9 KB Created: 2021-06-08 21:53:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f356fdff891e27764634aecac632f356 SHA-1: 1cfc858a1ed2594fa1f35a6301221e041407c8e6 SHA-256: 80bb000a0c87dac26ab37a2775360b6ec102ecfc4963919a4d47ed01ae8efbc0
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 0.9865

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/how-to-get-free-robux-earnrobux-today-game-hack PDF link annotation
    • http://xn----7sbq6amdnuk.xn--p1ai/images/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/how-to-get-free-robux-in-adopt-me_GM431946152.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/tiktok-download-free-jio_GM835599320.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/roblox-pics_GM431946152.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://xn----7sbq6amdnuk.xn--p1ai/images/free-spins-on-coin-master-cheat_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
stream_004_off00004f95.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F95 26224 bytes
SHA-256: f74d970c58ee347e78bfa26478570babbf44fc0d61541b523322eb52c575d0b8
font_01_sfnt_off00008b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B21 18864 bytes
SHA-256: 4d960c620feec7d23fe4469c2d0f481339a50bc0479e18a2442dba04fb2cecfd

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