Malicious PDF — malware analysis report

Static analysis result for SHA-256 feaec9f14ed1e467…

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 04:42:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a92233a072aaed5e4d0ea20d406aae49 SHA-1: 6216eb3d6091f696dfe8cce0480d51d654d3fcf4 SHA-256: feaec9f14ed1e4675f9bddd47b91b0834d9174d92362b02c66aa4896e9932598
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a lure for 'Free Robux Generator 2021 No Survey', indicating a phishing or scam attempt. The primary URL, http://netcdn.tw/app/431946152/free-robux-generator-2021-no-survey-game-hack, is directly linked to the lure. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to potentially malicious sites.

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-generator-2021-no-survey-game-hack PDF link annotation
    • http://www.myresidence.lu/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/como-tener-robux-hacks_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-hack-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/filtered-v12-roblox-cheat-download_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/robux-promocode-hack_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/roblox-free-items-glitch-2021_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/robux-generatr-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.myresidence.lu/userfiles/files/how-do-you-get-free-robux-from-roblox_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_off00003030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3030 22812 bytes
SHA-256: 1f8431902ae2589bfebf2d4b1effe83f623a457532f3a5e5669fc80263307a64
font_01_sfnt_off0000621e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621E 19516 bytes
SHA-256: 215bbe1509df05bb6592a2eb23184ac9fd1abeffda7f861746e5b701ad597e03

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