Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f7ad9aa36d1ed0…

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 11:32:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b265b07ff5201e514531ca2504ebe9d4 SHA-1: 9cb0f798797c36a44b5e02500dffba0c9560abd8 SHA-256: 54f7ad9aa36d1ed0cb3c0f9db7309d445aae49cc6a3ddb51539c4651190dd30d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one that redirects to known malicious infrastructure. The primary lure appears to be a 'free generator / game hack' for Robux, designed to trick users into clicking the malicious link. The document body and embedded URLs strongly suggest a phishing or scam attempt, likely to lead users to a site that may host further malware or attempt credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-do-u-get-free-robux-2021-game-hack In PDF document text
    • https://malungtreks.com/userfiles/files/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-free-clothes-without-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-hacks-and-cheats_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_off0000326c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x326C 22352 bytes
SHA-256: 93082b0f6b8922b01eca5241ae096572aa893340b68db07c2631daa1bf2ff3c6
font_01_sfnt_off00006405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6405 19556 bytes
SHA-256: ee909949778bcc1eaeaae663f07e5a0770d7aed4eef67476ef7171e54895eba2

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