Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcd7029be60502f…

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 06:18:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: aa66e7e71b0d3d05a5b93d3b3a60c630 SHA-1: 99e32d4a3604fda2a25f06cbd668d3be23f64e4e SHA-256: fbcd7029be60502f3619629ec4c9bfeb16b00010cb0cde8180f8a02f107604f7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free Robux' and 'game hacks' to entice users. It contains an embedded URI pointing to a suspicious domain, likely serving as a redirector to malicious content or a phishing page. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a social engineering campaign.

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/free-robux-no-verification-or-survey-game-hack PDF link annotation
    • https://goodtools.tw/upload/files/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-heros-of-robloxia_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-today-pc_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-free-domino-crown_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-roblox-accounts-new_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/husky-800m-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-make-things-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/i-succ-for-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/roblox-hunter-x-hunter-lvl-hack_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-cards-and-spin-link_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_off00002f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F96 22784 bytes
SHA-256: f6ed27a01091364fe9df5a4fdea7b47c4ac883152371f8c81810de37f845f8fa
font_01_sfnt_off000062b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B2 19368 bytes
SHA-256: 551afc8435a3263a9a14f68c6fac56cdd03dabd4713ff120a4b3cc718d9f39ef