Malicious PDF — malware analysis report

Static analysis result for SHA-256 b049a0a7cc431c8b…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 20:45:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cb00ebeda1d2f543805b99c22dfcb3ef SHA-1: 69fa35b80ffafeeeea838c437aef5d341fc3bde1 SHA-256: b049a0a7cc431c8bf4de8de7a613b04e1cd4ade35ceebe911c921ec69a3d705f
82 Risk Score

Malware Insights

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

The PDF document contains multiple links and lures related to 'free Robux' and game hacks, indicating a social engineering attempt to trick users into visiting malicious sites. The primary link, http://netcdn.tw/app/431946152/codes-how-to-get-free-robux-game-hack, is flagged as a redirector for game hacks. The document's content and heuristics strongly suggest a phishing or scamming operation.

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/codes-how-to-get-free-robux-game-hack PDF link annotation
    • http://apps.esqbs.ac.id/ebs_library/repository/roblox-lego-hacks_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-marshmallow-head-in-roblox-2021-fr-free_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-free-money-on-adopt-me-roblox-2021_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-and-tickets-2021_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-hack-a-pin-code-in-roblox_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-no-human-verification-or-survey-2021_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_off000030cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30CC 21972 bytes
SHA-256: ade199490c88726da289d5a1c7dd8edbc1e1d55949dc127c64ccfbb7800ea521
font_01_sfnt_off0000610f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610F 19156 bytes
SHA-256: 1abe1f888ea44a86c9f7894949bd06bee09219bb3a2585bcc6d0e8e487c16c49

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