Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a94031202ebae9b…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 06:01:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e5727ce1cb1902ce3f6613aa4d288853 SHA-1: 22121e5ceeda17a1b4a85ca962c2bc4179233336 SHA-256: 1a94031202ebae9bd4a0b85660307901fc83059539a21f0f9bc4674946fdafe3
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and heuristics indicating a lure for game hacks, specifically targeting 'Robux' for Roblox. The primary malicious URL identified is http://netcdn.tw/app/431946152/robux-com-free-game-hack, which likely serves as a redirector to a malicious payload or phishing page. The presence of a 'free generator / game hack' lure and instructions for password-protected archives suggests a social engineering tactic to trick users into downloading or accessing malware.

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/431946152/robux-com-free-game-hack PDF link annotation
    • http://smkn1salatiga.sch.id/library/repository/free-straight-face-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/mobile-hack-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/cheat-roblox-rs-2021_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-jailbreak-play-for-free-online_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-hack-roblox-accounts-password_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-airport-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-admin-panel-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-shirts-for-boys-free-shipping_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/undetectable-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-live-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-santa-hat-free_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-admin-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/robux-hacked-generator_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_off00003309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3309 22184 bytes
SHA-256: f8986e3cc5169a69d11e84558f5fddfb37f6dfc2efe1f301ca197b2f818ca874
font_01_sfnt_off00006451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6451 18976 bytes
SHA-256: 27896acad5ca474033774e3721745fbaf6546dbb33b60a4a93bb974a81ff43ff

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