Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c4e1c13e6b5922f…

MALICIOUS

PDF

33.4 KB Created: 2021-07-09 00:57:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 322bc0f76b7fda6978120a4ca3d31197 SHA-1: 662afe6dc1b20aaed3d56c632c15af0a823395e0 SHA-256: 4c4e1c13e6b5922f2ce68d73fa53c75e006cb92d73299b14114c23ae570d694b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector, designed to lure users into downloading potentially unwanted or malicious files. The document body and embedded URLs suggest a scam related to game currency or hacks, likely intended to trick users into visiting malicious sites or downloading malware. No scripts were extracted, but the presence of malicious redirector links and the lure content strongly indicate a phishing or malware distribution attempt.

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/roblox-robux-game-hack In PDF document text
    • https://www.summerland.com.tw/upload/files/robux-cheats-no-download_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-meep-city-cheats_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-hack-robux-on-ios_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/earn-robux-sites_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/how-to-get-free-robux-without-buying-it_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-for-free-no-signing_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.summerland.com.tw/upload/files/free-spins-coin-master-links-blogger_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_off00002c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C64 22520 bytes
SHA-256: 85a5ffdaafab9d780db5eacad5dd0bbc664709ad2283b3a0546da3133515e703
font_01_sfnt_off00005e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9F 18628 bytes
SHA-256: 91fe40ca7b1c63e097b3ed98f551f0053b3fa477182f2dddb1f8374deacdf7be

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