Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f32cfd28a34eea8…

MALICIOUS

PDF

35.6 KB Created: 2021-07-01 14:31:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f1fea698acdf535dd68ccc0ad292bc0b SHA-1: e91f1a61e89f0d3fc00b298f4bbdbac69a4aa28c SHA-256: 3f32cfd28a34eea89f3ac888634fbad1cb5d4d95cef43a21ec72f2626eb5704f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are SEO-optimized PDFs promising hacks or free currency for games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, and the ML classifier strongly suggests maliciousness. The document body and extracted URLs point towards a social engineering lure to trick users into visiting potentially malicious sites.

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/how-to-hack-roblox-accounts-with-cheat-engine-6.2-2021-game-hack
    • https://trustindoutama.com/assets/CKImages/files/free-robux-without-doing-anything_GM431946152.pdf
    • https://trustindoutama.com/assets/CKImages/files/roblox-free-robux-no-verification_GM431946152.pdf
    • https://trustindoutama.com/assets/CKImages/files/how-to-use-a-script-hack-on-roblox_GM431946152.pdf
    • https://trustindoutama.com/assets/CKImages/files/minecraft-free_GM479516143.pdf
    • https://trustindoutama.com/assets/CKImages/files/coin-master-hack-generator-tool_GM406889139.pdf
    • https://trustindoutama.com/assets/CKImages/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdf
    • https://trustindoutama.com/assets/CKImages/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://trustindoutama.com/assets/CKImages/files/coin-master-free-spins-promo-code_GM406889139.pdf
    • https://trustindoutama.com/assets/CKImages/files/free-robux-no-verification-needed_GM431946152.pdf
    • https://trustindoutama.com/assets/CKImages/files/hack-minecraft_GM479516143.pdf
    • https://trustindoutama.com/assets/CKImages/files/robux-link_GM431946152.pdf
    • https://trustindoutama.com/assets/CKImages/files/roblox-hair-for-free_GM431946152.pdf
    • https://trustindoutama.com/assets/CKImages/files/free-2021-robux_GM431946152.pdf
    • https://trustindoutama.com/assets/CKImages/files/coin-master-free-spins-and-coins-link-today_GM406889139.pdf
    • https://trustindoutama.com/assets/CKImages/files/coin-master-free-spins-2021-app_GM406889139.pdf
    • https://trustindoutama.com/assets/CKImages/files/coin-master-free-spins-blogspot_GM406889139.pdf
    • https://trustindoutama.com/assets/CKImages/files/hack-coin-master-game-download_GM406889139.pdf
    • https://trustindoutama.com/assets/CKImages/files/how-to-use-free-gamepass-scripts-in-roblox_GM431946152.pdf
    • https://trustindoutama.com/assets/CKImages/files/free-minecraft-mods-for-xbox-one_GM479516143.pdf
    • https://trustindoutama.com/assets/CKImages/files/robux-free-now_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003178.bin
6142bf4ea2403b4d4f602fddb3f1c7838975f5c40a455b4b13de709d3e691f65
pdf-font-stream PDF embedded font (sfnt) at offset 0x3178 22164 bytes
font_01_sfnt_off0000629c.bin
8287177200f6930e44f85156388adb4c35a051edb17c97f63ecfad5d07928c2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x629C 20184 bytes