Malicious PDF — malware analysis report

Static analysis result for SHA-256 529d0cda06e77cc2…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 09:05:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e9242dbc1cfaba3c4fe240ed4a799314 SHA-1: 60f546dfbec40cc77eec0b6802265ad0a11843b6 SHA-256: 529d0cda06e77cc2666c41dc3014a1881efc47bd9ab8e525c53d8a63f995ec65
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-confidence heuristic firing for a 'free generator / game hack' redirector lure, pointing to a suspicious URL. The document body also contains this URL, reinforcing the social engineering attempt to trick users into downloading or executing further malicious content. The ML classifier also strongly indicated maliciousness.

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/431946152/free-roblox-avatar-ideas-game-hack PDF link annotation
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-free-robux-july_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-hack-apk-ios_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/hacks-pa-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-free-items-pastebin_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-roblox-gg_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-roblox-passwords-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/todos-los-hacks-de-check-cashed-v3-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-free-robux-for-no-cost_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/hack-killerboyjuan123-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-free-robux-on-ios-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/roblox-xd-hacker-cheater-xd_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_off000031e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E1 22476 bytes
SHA-256: 3c1ea459b7e2462309257368e7e54c42159612b1d25af33443cd7714197c34d3
font_01_sfnt_off000063ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EA 19040 bytes
SHA-256: ad2d59536519275d6c005bbb7f6b17868ed93de8c720afdca884edb772968032

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