Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b361eebec37654…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 12:51:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1a770970346c417de3406f3e6fc0555f SHA-1: 66dc6d5246c7d0522e8ffc1482f5aca8fe3a91fc SHA-256: 72b361eebec37654732fa929d368285fa113f901f41d8675222c46d84e900bd3
82 Risk Score

Malware Insights

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

The PDF document contains a prominent link disguised as a 'free generator / game hack' for popular games like Coin Master and Roblox. This lure, combined with the 'SE_DOWNLOAD_BUTTON' heuristic, strongly suggests a social engineering tactic to trick users into visiting a malicious URL. The ML classifier also flagged this PDF as malicious with high confidence.

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/406889139/online-coin-master-free-spin-app-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-on-roblox-with-inspect-element_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-on-ipod_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-fashion-frenzy-free-games_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/clothing-advertisement-roblox-template-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-games-that-i-can-play-for-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-swordburst-2-hack-download_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/como-hackear-cuentas-de-roblox-real_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-no-human-vetifycation_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-noclip-in-roblox-with-cheat-engline_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/easy-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/comment-avoir-admin-commande-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-slx-free_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_off00003172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3172 22260 bytes
SHA-256: c2ba9c1f89b568254afcb6b90c597b241f054053aa202fbdb8924b32851269a6
font_01_sfnt_off000062fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FE 18248 bytes
SHA-256: 8511f034c042b64c11128f6e64b973dd4e7735d2e311e35d0d6ef7240f4bb090

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