Malicious PDF — malware analysis report

Static analysis result for SHA-256 45bd1edd8260c106…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 03:41:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 660acab79d93bf18a08e34d861d6729f SHA-1: c5476e211dfaee4bd2db900fff97f296c7660614 SHA-256: 45bd1edd8260c1069bd2093a370a44f98c982e1b90a8be4806303c524e684b92
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a high-confidence ML classifier flagged it as malicious. The document body and heuristics indicate a lure related to 'Roblox 2021 Hack' which redirects to a suspicious URL, likely to download a second-stage payload or phish for credentials. No scripts were extracted, but the PDF structure and embedded URIs suggest a social engineering attack.

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/roblox-2021-hack-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-stella-working_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/bape-roblox-free-tshirt_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-roblox-cheat-engine-65_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/oprewards-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-equip-the-free-item-in-roblox-deathrun_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/rbxcity-free-robux-instant-pay_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/2021-hack-gui-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-muscles-t-shirt_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-no-wait-to-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hacking-codes-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hacks-for-roblox-for-rubox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/i-got-hacked-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-abonns-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/downloaf-free-roblox-robux-codes_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_off00002de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE9 22020 bytes
SHA-256: c18caf09b11ab873c84892a530430279bdcef3aaa2bcc93d4a62324837e6dfde
font_01_sfnt_off00005eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB3 19056 bytes
SHA-256: d12ed7f60ab6f0ee9203b204c43922ef7388aa7296366b2a65af9fb0b247c164

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