Malicious PDF — malware analysis report

Static analysis result for SHA-256 c12aa77be63deac5…

MALICIOUS

PDF

33.7 KB Created: 2021-07-09 12:42:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a55e59f5647314f2b122501c67c57d26 SHA-1: f9f6e175514299c13dfc2fcdd018040c0a9ed79d SHA-256: c12aa77be63deac586a22e8991eac5f6f0bfb3eb250260b6bbc41b360010cfd3
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/406889139/lastrick-com-coin-master-hack-game-hack PDF link annotation
    • http://www.myresidence.lu/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/jump-hack-roblox-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-hack-client-no-survey_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/get-free-cloths-off-of-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/games-for-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/download-roblox-for-free-unlockable_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/get-free-lp-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-players-for-free_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-lv6-free-trial_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_off00002f23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F23 22352 bytes
SHA-256: 9569275b489b7bbef6b20d3e6aa588199d6d69c8e3021cd0cbff31fd51f3e358
font_01_sfnt_off000060f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F7 18264 bytes
SHA-256: 7487f1ced9a0ef44a39375eecee508f8bc18e69c364675b0881c5394564d02ce

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