Malicious PDF — malware analysis report

Static analysis result for SHA-256 49762aae91c73e8f…

MALICIOUS

PDF

33.5 KB Created: 2021-07-03 11:47:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 655af34e16607e51036c81e80eee7fd6 SHA-1: 509e30ddfee72f998f88f23bcf12f4d27359951e SHA-256: 49762aae91c73e8fd0c2e4b45ed368c3027a837a72c5c1dda25e051fae3b175d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains links to a known malicious redirector infrastructure, specifically advertising 'robux in-game hack' generators. The document body and embedded URLs strongly suggest a lure for users seeking in-game currency or cheats, which is a common pretext for phishing or malware distribution. The primary malicious link identified is http://netcdn.tw/app/431946152/robux-in-game-hack, which likely leads to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-in-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/h-get-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-by-watching-ads_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_off00002dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEC 22176 bytes
SHA-256: a3d7fcdaa6f2a59d6a21c4d0ce887bd615b15d20ee939cef614d68da5a4ee226
font_01_sfnt_off00005f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F34 18552 bytes
SHA-256: 0d067593471fd495c76aa0173ccdec3c7a57065eb2f68b568cda202f17f51f7f

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