Malicious PDF — malware analysis report

Static analysis result for SHA-256 5197fc00e4c1fdc4…

MALICIOUS

PDF

251.2 KB Created: 2021-07-01 00:46:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 136b9bc2f901deabaefc60645b999885 SHA-1: 69bbd2b5c8703a4132b9a3f46dbd7943acbb36dc SHA-256: 5197fc00e4c1fdc46ce24321ee65a2f45f035ebb5b25973738a001800dee8680
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link T1555.003 Credentials from Web Prompts

This PDF document employs a game hack lure to trick users into clicking a malicious link. The linked URL is associated with a fake CAPTCHA or MFA prompt, designed to harvest user credentials or session tokens. The document also impersonates the brand 'Apple' in its phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0098

Heuristics 8

  • 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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/1330123889/near-pubg-uc-code-game-hack.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.co/app/1330123889/near-pubg-uc-code-game-hack PDF link annotation
    • https://www.advancissurgical.com/uploads/files/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hack-for-apocalips-rising-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/descargar-roblox-apk-hack-monedas-infinitas_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-robux-not-clickbait_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-in-a-hacked-account-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/cheat-roblox-jvc_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/yandex-disk-download-744d2021b6-robux-cheat-trs-rar-html_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/archery-master-3d-apk-and-mod-free-download-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-hack-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-no-human-verification-or-survey-2021_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_024_off00038046.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x38046 25928 bytes
SHA-256: 9d88b092bfac3784876b466de0b9668ed319170c392f25dca0ca5868f784d1af
font_01_sfnt_off0003bd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BD50 18440 bytes
SHA-256: b6377f02ade121cffbdc2ff069b907685312a16d3e533fba81b7df981143da67