Malicious PDF — malware analysis report

Static analysis result for SHA-256 82edc6ae9986cf31…

MALICIOUS

PDF

32.4 KB Created: 2021-06-18 01:58:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0891ae07a9a38a65c4e3ef57450590a1 SHA-1: 31157011e086654fb6153bf09657b1a9aa1d84f2 SHA-256: 82edc6ae9986cf31b9b449eccc49b77b57251cb45cc84426d0583e5cbbd26248
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a call-to-action lure for 'free Robux' and game hacks. The primary URL, http://netcdn.co/app/431946152/free-robux-in-a-roblox-game-game-hack, is likely a redirector to a malicious site or a download for malware. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/free-robux-in-a-roblox-game-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/slurp-cheat-in-roblox-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/pokemon-go-free-gift-codes_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-gift-ard-pin-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-generator-download-no-surveys_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-a-hacked-account-back-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/cheats-for-getting-money-in-roblox-meep-city_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/earn-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-free-robux-with-no-verification_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_off00002aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA1 21584 bytes
SHA-256: b385fd58e169268870167d1c2c184a32df266c681c1bfea3e6fd2c5bb066ecba
font_01_sfnt_off000059e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E7 19052 bytes
SHA-256: 414ce41417c5110df01347698a0c27eb20b599732f4903af6e84d66b1110a6e5

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