Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6e9465a043af03…

MALICIOUS

PDF

34.6 KB Created: 2021-06-22 21:21:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1b655a3d44157de49cbb7cdf76ae102e SHA-1: 1dbdf83328a67606826247d9ddcc9cc7f7e48d11 SHA-256: 8f6e9465a043af03515578ea42ff47e116b10203f9e557f985c162e3bbd6bc0d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which are algorithmically generated and point to files with names suggesting game hacks or cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of a visual download button further supports a malicious intent to trick users into downloading further content. The document body and extracted URLs indicate a lure for game-related exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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
  • 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/como-ser-invisible-en-roblox-hack-game-hack PDF link annotation
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-cs-go-aimbot-hack_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/hack-roblox-shopping-cart-script_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/tiktok-free-install_GM835599320.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/minecraft-menu_GM479516143.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/roblox-build-a-boat-for-treasure-free-thrusters_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/best-way-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/coin-master-card-collection-hack_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://ciptawiratirta.com/assets/CKImages/files/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.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_off000030ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BA 22216 bytes
SHA-256: 7b3108571b15463a5b397eb30ba78c12e4a83fb3ef2e59797cc64d49de635528
font_01_sfnt_off0000621e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621E 19148 bytes
SHA-256: b6de933c1f998ffbf2be2f49fed4f5c8b8c996ae71dd5e3ee710565fc125b678