Malicious PDF — malware analysis report

Static analysis result for SHA-256 191c6e3d26ca06f9…

MALICIOUS

PDF

34.8 KB Created: 2021-07-07 20:07:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8dccad7f94e3a50e164e6a5e67fc73a4 SHA-1: 119d5dd1506a2ad4f249f86ec3dd0d09f642502f SHA-256: 191c6e3d26ca06f9ea15f82acc89c8ddea26ab58fcb52562f55639b639aaabdb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/how-to-hack-people-on-roblox-game-hack PDF link annotation
    • https://www.atrax.hr/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/roblox-robux-hack-no-survey-mac_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/free-roblox-accounts-to-use_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/all-client-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/roblox-build-a-boat-for-treasure-hack-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/roblox-games-free-online-for-kids_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-free-robux-december-2021_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/pastebin-robux-promocode-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-get-free-robux-fast_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_off00002ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF3 22720 bytes
SHA-256: f89403148bb39a301b8a12504691454fbaaced823453362281d0105f91b0cded
font_01_sfnt_off000062bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BC 19148 bytes
SHA-256: 0496404f34f461102572dff09184c0b6082fd286070dd383a6badfad3968c72e

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