Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b83f203581855b…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 23:01:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8b0707389b9ad96aa2bf9152f8d2fe3b SHA-1: 29fd633a2e08a87271e3218b3df0aae5119b3113 SHA-256: 42b83f203581855b6ba326a211785dfc3d691655976bededcc9ec0fe4bbcc7cc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to 'free generators' and 'game hacks', specifically mentioning Robux and Coin Master. It includes a high-confidence heuristic firing for a 'GAME_HACK_REDIRECT_LURE' pointing to the URL http://netcdn.tw/app/431946152/how-to-get-a-robux-gift-card-for-free-game-hack. This URL is likely intended to lead the user to a malicious site, potentially for credential harvesting or further malware delivery.

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-get-a-robux-gift-card-for-free-game-hack PDF link annotation
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/robux-hack-download-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-gear-roblox-script-pastebin_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-it-isint-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-font-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-many-levels-in-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_off00003345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3345 22060 bytes
SHA-256: 794c19716b487ffe880303bc562720c50ea9d7ec2ab2d2ed1151bde56e4faf52
font_01_sfnt_off000063fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FE 19092 bytes
SHA-256: 3a20477eb256b5c82d1e95547d96c473e85f74b2163bcf7c7e3732ca0aac5f89

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