Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2f40616a5976a6…

MALICIOUS

PDF

41.8 KB Created: 2021-05-17 02:43:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e0c60865b6fb2dad5a1b4b79cdca7212 SHA-1: 2624991ea61bab10fa7823fd1050ce548c559f94 SHA-256: 6b2f40616a5976a6d6a02fa18c633ca73e029a409681d273574420e44d7f31c6
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 0.9971

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 https://netcdn.xyz/app/406889139/master-coin-free-spin-daily-game-hack PDF link annotation
    • https://www.gymun.cz/images/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-real_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-get-free-unlimited-coins-in-coin-master_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_003_off00004818.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4818 25064 bytes
SHA-256: 62d1c5f4a770c211eeb52cfec1f216e2647184ebd72ce616791175330f881552
font_01_sfnt_off00008118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8118 18308 bytes
SHA-256: 29cb14730145ee7b34c09c890f7b8837377acbe26d0b8b5df788708214c202fb