Malicious PDF — malware analysis report

Static analysis result for SHA-256 3468c11e6db0a0e3…

MALICIOUS

PDF

46.7 KB Created: 2021-05-14 11:13:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 16b9717ebe821d0f90be444a96881b16 SHA-1: 5432a72f679991d2c264f2adc083f1e600d21ded SHA-256: 3468c11e6db0a0e3babda61804a584ec3a3b578000708ad6c5bbef65409f967d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it's a lure for game hacks and redirects to external URLs. The document body, though partially corrupted, contains references to 'Synapse Roblox Free' and a URL that aligns with the 'free generator / game hack' lure. The presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent, likely to trick users into downloading potentially harmful software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/synapse-roblox-free-game-hack PDF link annotation
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/robux-robux_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-robux-android_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4974 26212 bytes
SHA-256: 69db5b3e700f30841af31453bde53aa610e94b7093ffdb20c4efeb8261551005
font_01_sfnt_off00008620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8620 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9331 18532 bytes
SHA-256: f2f65d939d1654862c473f31792bb3f0ee87d7638af2cc9574134150feb2cc2e

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