Malicious PDF — malware analysis report

Static analysis result for SHA-256 36868cffa26370f9…

MALICIOUS

PDF

252.2 KB Created: 2021-07-07 19:17:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 30d85175a345059b0d862b0aea2f5751 SHA-1: 97557c0acf019b48723d5df7360a91041aa4c8b5 SHA-256: 36868cffa26370f9d35b72aa8bad6cef85456522679ed66746ad12be9129181c
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious. It uses brand-impersonation credential phishing, a fake-CAPTCHA lure, an MFA/2FA-themed lure and an urgency-based 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 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.tw/app/1330123889/pubg-uc-ykleme-kod-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.tw/app/1330123889/pubg-uc-ykleme-kod-game-hack PDF link annotation
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/earn-robux-online_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/how-to-enable-speed-hack-on-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/what-player-got-banned-for-using-free-models-roblox_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/shirt-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/roblox-jailbreak-hack-noclip_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/noclipper-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/roblox-hack-2021-download_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/how-to-get-story-mode-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.laxmansartemporium.com/uploaded_files/userfiles/files/roblox-murder-mystery-2-halloween-hack-candy_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_off00038176.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x38176 26284 bytes
SHA-256: aca407375c4214dd36da04b9de57c635ecda2c218f309bfc41dfdc8387036b1d
font_01_sfnt_off0003bf1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BF1F 19108 bytes
SHA-256: 370f1fa1e4b96650148a9802d5deb865384ce34427f7693e4bd9a5154bc31159