Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b95b24e8ed7b041…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 02:19:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1a2793a425623ec8b48590c7c8982c4a SHA-1: 40f2d93205f5d3f1d1d4a41f0d1c2c656256c04f SHA-256: 2b95b24e8ed7b0418f91182be577a8fd06fd4e3a81a6c34e6ffecab208952b6e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a lure of free game accounts and hacks to entice users to click on embedded links. The primary link directs to 'netcdn.tw', which is flagged as a game hack redirector. This suggests the document is designed to lead users to potentially malicious websites for credential harvesting or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/479516143/free-minecraft-premium-account-game-hack PDF link annotation
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/how-to-use-cheat-engine-for-executing-scripts-roblox_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-robux-pastebin-no-wait_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-version-of-synapse-roblox_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/tiktokexe-free-download_GM835599320.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/roblox-lucky-block-hack-script_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-robux-android_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/best-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/www-hack-roblox-online_GM431946152.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.b2bonline.ph/uploaded_files/userfiles/files/free-robux-giver-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
font_00_sfnt_off00003047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3047 22168 bytes
SHA-256: eb5a779b43701b2647a7ecf99e98fc4b583cbf2260c12c5e898638ffa29ec1fc
font_01_sfnt_off0000617a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x617A 18552 bytes
SHA-256: 335ad5bd11d1b5490beeffd4b04e426b92c3c8588cbb26eb3dbcf918d515cd86