Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d84d8a66150e70b…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 17:35:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a73ac0986b577e7eaaf463b2275cf7f7 SHA-1: f77a13d2f0d33b88e552d3538287ec593c871edc SHA-256: 9d84d8a66150e70bba0fe607961c94c5859557dc7da4da4eba92aebd10a57132
82 Risk Score

Malware Insights

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

This PDF document employs a lure related to 'free Robux' and game hacks, as indicated by the document body and heuristic firings. It contains multiple embedded URLs pointing to suspicious domains, likely intended to redirect the user to a malicious website or initiate a download. The ML classifier strongly flagged this PDF as malicious, suggesting a high probability of it being part of a phishing or malware distribution campaign.

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-robux-no-password-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/white-pants-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-promocodes-hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-hacking-bans_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-places_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hacking-clients-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-para-roblox-facil_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-1-million-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robux-website_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/cheat-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/give-me-free-robux_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_off00002e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E33 21552 bytes
SHA-256: 7050c63cc7b652756ee65f3d5e787501fcc7bfc189e8a5451372c7b6d39656f4
font_01_sfnt_off00005d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9F 19208 bytes
SHA-256: 6b3d0efb3debf488fe81ea92b60c01ccbae5249fd0a29fdced25ee5be01c6081

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