Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbf718f1150f9177…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 11:36:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e906081839ec35bbee4a18dd55a7ff1a SHA-1: 98d35210a4048598157364bfe517429fd1c10b5f SHA-256: dbf718f1150f9177688b1c06cc1aadcbf0df7a8ac9910d421fb951a14718b137
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many pointing to IP addresses, that are designed to trick users into downloading malicious files by promising free in-game currency or hacks. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed for SEO poisoning to attract victims. No scripts were extracted, but the overall pattern is consistent with a phishing lure leading to malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.tw/app/431946152/script-executor-roblox-free-game-hack
    • http://111.68.26.74/widyapustaka/repository/minecraft-pe-free-download-android_GM479516143.pdf
    • http://111.68.26.74/widyapustaka/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/who-hacked-john-doe-roblox_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/2nd-best-hacker-on-roblox_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/bloxland-earn-free-robux_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/free-robux-safe_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/coin-master-free-spins-coins_GM406889139.pdf
    • http://111.68.26.74/widyapustaka/repository/how-do-you-get-robux-for-free-on-pc_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/minecraft-windows-10-hacks_GM479516143.pdf
    • http://111.68.26.74/widyapustaka/repository/hack-no-survey-roblox_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/free-roblox-gift-card-codes-2021-unused-no-human-verification_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/roblox-games-for-free-to-play-online_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/free-robux-without-doing-anything_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/cheat-mining-simulator-roblox_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/code-for-roblox-robx-hack_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/hackear-cuenta-de-roblox-2021_GM431946152.pdf
    • http://111.68.26.74/widyapustaka/repository/cheat-codes-for-roblox-rocitizens_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000300c.bin
c418db4f80c4eef6f8f920a59c500097870b28cee590ae38b01a6efc561fd1fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x300C 22404 bytes
font_01_sfnt_off000061a1.bin
f3a51fc67d8c05d2e4aad044fefa6f3423405f670f78b1fc55f86c37a2c91406
pdf-font-stream PDF embedded font (sfnt) at offset 0x61A1 19192 bytes