Malicious PDF — malware analysis report

Static analysis result for SHA-256 a86cf1f719d44df1…

MALICIOUS

PDF

34.2 KB Created: 2021-07-09 17:52:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 29ff90b444071ad66aa13b16f13520ce SHA-1: 2ee4a4228c18e4189e68356dabff6d43dae89c77 SHA-256: a86cf1f719d44df1ad55164f1ed9b1d9ded866a7debec992a790c17962e899ed
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free currency, directing users to the URL http://netcdn.tw/app/431946152/earn-free-robux-online-no-survey-game-hack. This heuristic firing indicates a social engineering attempt to trick users into visiting a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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/earn-free-robux-online-no-survey-game-hack PDF link annotation
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/can-u-get-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-50-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-como-tener-robux-gratis-2021-el-hacker-gato-loco_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/300-daily-free-spins-coin-master_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_off00002ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF0 22336 bytes
SHA-256: 83fbda0504c7d1ab7cd490f7980497ba382222b91e55e510bb4e29d8c487776a
font_01_sfnt_off000060b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B3 19016 bytes
SHA-256: 53e0baab674ec804a6965d9a56fc1952284b02a56ead0fbd107daffa4215895d

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