Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4d2c4a8d4174e0…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 16:51:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c61c182f3e10957e6623c6c87a2ded12 SHA-1: e928b844e41c53748d40a13e0f2d9faf0059ff48 SHA-256: 8d4d2c4a8d4174e0dc67fa8c7464e186517565458dd5be72eac9dae7637d533d
142 Risk Score

Malware Insights

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

This PDF document employs a game hack lure to entice users. It contains numerous links to external websites, including a primary redirector at http://netcdn.tw/app/479516143/minecraft-hack-2021-game-hack, which is likely used to distribute malware or lead users to phishing pages. The PDF also functions as a link farm, pointing to many other PDF documents hosted on pt-mataram.go.id, suggesting a coordinated SEO manipulation or content distribution effort.

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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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/479516143/minecraft-hack-2021-game-hack PDF link annotation
    • https://pt-mataram.go.id/perpustakaan/repository/free-clothes-on-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/roblox-free-acount-with-rogue-linrsge_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/roblox-royale-high-free-vip-server_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/roblox-hack-mad-city-2021_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/roblox-free-face-mask_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-change-name-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/hacks-master-keys-dungeon-shooter-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-robux-codes-4-500-2021_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-hack-roblox-accounts-with-pastebin_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-exploit-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-many-levels-are-in-coin-master_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_off00003314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3314 21696 bytes
SHA-256: 04e37cc5aef6af3796716a654116c7a0d99c8a031df4be7c8f75f6e1ce645e94
font_01_sfnt_off00006229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6229 18428 bytes
SHA-256: 65ef7673dda910d5c1206c2dd7dddcbba7cd96e5a7782ef6ed0e94e119ec4adc

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