Malicious PDF — malware analysis report

Static analysis result for SHA-256 644ef88b2556cb88…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 14:17:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d90b37f5d0bff923a0bcc1f33a700500 SHA-1: a2f3571fee0e88c92983ab00482d2122dfbcb728 SHA-256: 644ef88b2556cb884346c01bdc41a7a5104fd3f970f12190f3dca3abd50b40ef
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency ('Add Robux') to entice users into clicking a link. The link redirects to a malicious website, likely to download further malware or engage in phishing. The ML classifier strongly indicated maliciousness, and the PDF's structure and embedded URLs support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/add-robux-game-hack PDF link annotation
    • http://perpus.polbitrada.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-supreme-roblox-modek_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-free-cards_GM406889139.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_off000052ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52AC 27092 bytes
SHA-256: 6059187eecdecf94d8cc17ccfed6a63a2314ecd41e638a41909f8190d18db1ed
font_01_sfnt_off00009101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9101 18024 bytes
SHA-256: 7c7f544dacbdd97523b26ca19281569c54d5524d70eae8adece71e08a4ebda33

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