Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e909f5cf5dcbcee…

MALICIOUS

PDF

43.5 KB Created: 2021-05-18 23:45:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7d46ad5f077dbeecaa96e7b15aba23ed SHA-1: d0e1ec7dc5a220d5bb6b55594daaefa25d4f310a SHA-256: 6e909f5cf5dcbceea97446d856a2dfee0aba9aec82394d10411f0d7b6787b808
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are structured as SEO-friendly URLs pointing to resources related to free in-game items or accounts. The ML classifier also flagged this PDF as malicious. The presence of a 'download button' heuristic further suggests a deceptive intent to trick users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/1094591345/is-pokemon-go-free-game-hack
    • https://culture.denpasarkota.go.id/assets/CKImages/files/youtube-how-to-get-free-robux_GM431946152.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/coin-master-free-spins-and-chips_GM406889139.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/how-to-get-free-spins-on-coin-master-android_GM406889139.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/roblox-free-play_GM431946152.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/hacked-roblox-accounts-list_GM431946152.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/how-do-i-get-free-robux_GM431946152.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/how-to-get-free-roblox_GM431946152.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/jailbreak-roblox-hack_GM431946152.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/minecraft-for-free-on-phone_GM479516143.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/how-to-get-free-shields-on-coin-master_GM406889139.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/robux-hack-no-human-verification_GM431946152.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/robux-giver_GM431946152.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/how-to-hack-roblox-for-robux_GM431946152.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/coin-master-blogspot-free-spins_GM406889139.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/robuxy-com-free-robux_GM431946152.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/coin-master-hack-lost-world-2021_GM406889139.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/coin-master-raid-hack_GM406889139.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/coin-master-free-link-spin_GM406889139.pdf
    • https://culture.denpasarkota.go.id/assets/CKImages/files/free-robux-safe_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004be2.bin
d0c81827b0484f41c42cc47529dc584c8262a7714936f0cb7518ba78b32d8f28		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BE2 26976 bytes
font_01_sfnt_off00008970.bin
14944d27005ed51d7c6ac49c8ce333f926e74bb830feeed203658805c6204e3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8970 17844 bytes

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