Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0918259a82a1a7…

MALICIOUS

PDF

35.7 KB Created: 2021-07-04 08:41:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1bc8f6d03416119ca42fba7aaa70827d SHA-1: 5ee5f095e88607737a3aa81546c45a7ad6cae93e SHA-256: af0918259a82a1a738e6c4e6cfdf2b76a5ea9ee45d27abf65fe1f46907e1d1c4
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive 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 malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/406889139/coin-master-free-spin-and-coins-links-2021-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/cheat-engine-roblox-2021-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robux-hack-for-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-easy-down-load_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-cheat-engine-jump-hack_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/is-every-game-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-com-free-play_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_off00003640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3640 22136 bytes
SHA-256: 607d62fe57e4ec2206404489e06f4837f7ef08ce82045098d192f6105d463f58
font_01_sfnt_off000066ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66EF 18920 bytes
SHA-256: 6400190eeb2151d5e1f5614a198f46375c96aba5f11acfeaff13e592fb093653

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