Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a5a0f0ec0b11fe…

MALICIOUS

PDF

43.2 KB Created: 2021-05-19 23:02:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ba8e8575d03934fbaa55e0d0b3a34273 SHA-1: 6c026a6a0f18ba80242dc34f340f08c8b906fea6 SHA-256: 00a5a0f0ec0b11fe85b80409d382e337ae017245f299cbe84aba42debb5de680
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically pointing to 'https://netcdn.xyz/app/431946152/instant-robux-game-hack'. The document body, though partially corrupted, contains text related to 'Instant Robux' and the same URL, reinforcing the lure. This suggests the primary goal is to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/instant-robux-game-hack PDF link annotation
    • http://biblioteca.ganexa.edu.pa/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://biblioteca.ganexa.edu.pa/repository/classic-minecraft-net-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
stream_003_off00004a69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A69 27172 bytes
SHA-256: ae30c09f11623ae38ae8e4cf02d386c08df1a37644c13dcff951707fd311744f
font_01_sfnt_off000086a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A9 18184 bytes
SHA-256: 234f9e95fa1241feb438ae0efba81c56d05ba2863eb0b0d090bdd6eb60e49a51

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