Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a79c88b555eb68…

MALICIOUS

PDF

31.7 KB Created: 2021-06-30 03:55:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 098196728741a983cc842e920bd66bcf SHA-1: d7c1bb2c453f5a8728741d635a6337e77062c9ec SHA-256: a3a79c88b555eb683f8b59360693d52c35d65019be78a7b20d8a26318bd163b7
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a high-priority heuristic indicating it links to a game hack redirector, specifically mentioning 'how to get flyable pets in roblox free game hack'. The document body confirms this lure, and the primary IOC is the redirect URL. While no scripts were extracted, the PDF structure and embedded links strongly suggest a social engineering attack to drive users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 3

  • 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.
  • 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/how-to-get-flyable-pets-in-roblox-free-game-hack PDF link annotation
    • http://www.vetmed.fkh.unair.ac.id/repository/free-roblox-item-list_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-nordvpn_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-ro-get-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/pubg-uc-kr_GM1330123889.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-bandana-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/robux-apk-free_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/hack-a-backdoor-into-a-roblox-game_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-get-any-item-free-hack_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/minecraft-server-hacks_GM479516143.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_off000030a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A5 21396 bytes
SHA-256: 436e1da4772aa6b3513a7cd4f9fa860a2133b86ecda36f2e67fb7e0b5b1260e2
font_01_sfnt_off00005f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F50 19252 bytes
SHA-256: 6e9c8b1d6e4b4fc4b7cf5e5aebbadecc9633cfba39eea764b074dd4cebe8f161

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