Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbbc79fc26814cc…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 03:22:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 721124d4c6fa6d48ef186c9d0c282db5 SHA-1: c938aec21d453c7e8460026be5b22135995207f6 SHA-256: afbbc79fc26814ccf323a2f736682079222e89201f02c166e5326bf2d87f5e9d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are hosted on alimi.com.tw and advertise game cheats and hacks, such as 'Robux Hack'. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document's primary purpose appears to be a lure for users seeking in-game advantages, likely leading to malware downloads or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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
  • 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.co/app/431946152/working-robux-hack-2021-game-hack
    • https://alimi.com.tw/upload/files/mcpe_GM479516143.pdf
    • https://alimi.com.tw/upload/files/best-minecraft-hacks_GM479516143.pdf
    • https://alimi.com.tw/upload/files/60-free-spins-coin-master_GM406889139.pdf
    • https://alimi.com.tw/upload/files/coin-master-hack-ios-no-verification_GM406889139.pdf
    • https://alimi.com.tw/upload/files/roblox-script-hack_GM431946152.pdf
    • https://alimi.com.tw/upload/files/roblox-vehicle-simulator-speed-hack-2021_GM431946152.pdf
    • https://alimi.com.tw/upload/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • https://alimi.com.tw/upload/files/ways-to-get-free-robux_GM431946152.pdf
    • https://alimi.com.tw/upload/files/free-roblox-card-code-generator-no-survey_GM431946152.pdf
    • https://alimi.com.tw/upload/files/robuxian-tutorials-free-robux-generator_GM431946152.pdf
    • https://alimi.com.tw/upload/files/roblox-fun-com-free-robux_GM431946152.pdf
    • https://alimi.com.tw/upload/files/roblox-island-royale-money-hack_GM431946152.pdf
    • https://alimi.com.tw/upload/files/roblox-gift-card-online-free_GM431946152.pdf
    • https://alimi.com.tw/upload/files/robux-hack-generator-no-human-verification_GM431946152.pdf
    • https://alimi.com.tw/upload/files/free-robux-gift-card-codes-2021_GM431946152.pdf
    • https://alimi.com.tw/upload/files/coin-master-golden-cards-hack_GM406889139.pdf
    • https://alimi.com.tw/upload/files/free-coin-master-spin-app_GM406889139.pdf
    • https://alimi.com.tw/upload/files/how-to-hack-coin-master-apkmody_GM406889139.pdf
    • https://alimi.com.tw/upload/files/coin-master-raid-hack_GM406889139.pdf
    • https://alimi.com.tw/upload/files/roblox-free-exploits_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e7b.bin
86f9f217e1e0c8b8002d6a689ea97234306b9cf6dff9af07c74ce09acd5cc20c
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7B 22208 bytes
font_01_sfnt_off00005ff4.bin
ebbb72e49613df871abdcaed899fd2076eff69a0aa729afaf85467da4703e8ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 19440 bytes