Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a1aaa4831ef32a…

MALICIOUS

PDF

35.9 KB Created: 2021-07-03 14:52:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: de13aea611d050bb6e8d7e0ebd273d10 SHA-1: fcddb6bcf6acfde543b2194d1553bea7ec89ee76 SHA-256: e7a1aaa4831ef32a211a1d384aaa877e6995f59e328f44663c5044f14caeda89
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to websites offering game hacks and free currency, with one primary link identified as a malicious redirector. The document body and heuristic firings indicate a lure for game-related cheats, likely to distribute malware or phish for credentials. Although no scripts were explicitly extracted, the nature of the links and the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic suggest potential for JavaScript execution or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/mangocheats-com-hack-coin-master-cheat-game-hack In PDF document text
    • https://malungtreks.com/userfiles/files/surprise-texting-hacked-roblox_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-electric-state-darkrp-hack_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-link-app_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/roblox-free-gamepass-script-v3rmillion_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/earn-robux-sites_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-free-robux-no-scams-no-human-verification_GM431946152.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://malungtreks.com/userfiles/files/coin-master-hack-without-verification_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_off00003577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3577 23196 bytes
SHA-256: 103d461fd22233576b0d58064c249ac37cd4f034221a51db207627e84d667a72
font_01_sfnt_off000069a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A4 18428 bytes
SHA-256: 9287b0c47ad934f43b8e17144c07c35ed04b9c51a026f2b6b881bae896865273

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