Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4dd0835482c477…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 17:17:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4120dbce05e38bb917e1ddf6cf9f2596 SHA-1: 45866065105ff31f4f6b81fe69ae660aae4035c1 SHA-256: 1c4dd0835482c47781a1c6b729ace1fad8efe84e1caca75d4214fc1864977488
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs that lead to external sites promising game cheats and hacks. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm designed to drive traffic to potentially exploitative content. The document body and heuristics indicate a lure for free in-game items, likely to facilitate further exploitation.

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.tw/app/406889139/free-coin-spin-coin-master-game-hack
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/hack-para-tener-robux-gratis-2021_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/boku-no-roblox-quirk-hack_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-100-spin-hack_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-cheat-in-roblox-jailbreak-2021_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-daily-spins-and-coins_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-hack-355_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-hack-tool-ios_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-minecraft-java-for-free_GM479516143.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/daily-free-spins-on-coin-master_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/ear-free-spins-for-coin-master_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-free-robux-february-2021_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-infinite-money-hack-jailbreak_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/hack-forums-roblox_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-hack-golden-card-in-coin-master_GM406889139.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/esp-roblox-hack-arsenal_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-gift-card-codes-free-unused_GM431946152.pdf
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-free-robux-hack-on-phone_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003159.bin
64032004d359b63b608797cd873bb4d150667b56156a69c6e60111b76f78159c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3159 22560 bytes
font_01_sfnt_off0000639d.bin
d77c170e67b3d95aa89eaeac5151d62a78b175d73055ea7797188e45ec8dab4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639D 18176 bytes

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