Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac78e61b8747a03…

MALICIOUS

PDF

36.1 KB Created: 2021-06-25 16:36:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e10d39fe8121749dcc606305d76e4fff SHA-1: f99a5caf939878f0bcc4222a27317b9fd11f2e37 SHA-256: 1ac78e61b8747a036f153af01f06eb456c4650ce80be956f0c1291e0093b49c5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

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.co/app/431946152/how-much-is-it-to-get-60-robux-for-free-game-hack PDF link annotation
    • https://ciptawiratirta.com/assets/CKImages/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/hack-aimbot-roblox_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-link-daily-get-free-spins-amp_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/is-pokemon-go-free-to-play_GM1094591345.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-daily-free-spin-and-coin_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
font_00_sfnt_off00003351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3351 22844 bytes
SHA-256: 36048da03bc8688359a18c9355ae346b50b2405a6ced36846788fc2e96c08283
font_01_sfnt_off0000665d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665D 19688 bytes
SHA-256: cda2834ed295b8bcd34d92b09e756fe94ecd0aa391807732832f0d9ad5018be4