Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f45febb5b486599…

MALICIOUS

PDF

35.9 KB Created: 2021-07-07 15:46:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9fe9d60e25c09a841dd77a9558476d50 SHA-1: c40d8f3690541c8c101e6d8202f8b2893f4c3ef2 SHA-256: 0f45febb5b4865997cfad14c7327d6b0960833c0d4ced849c43670d630a99de7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes game hacks and free in-game currency, strongly suggesting a phishing or malware distribution lure. The presence of a "PDF_SEO_LINK_FARM" heuristic indicates a large number of external links, many of which point to pages offering exploits or cheats for games like Coin Master and Roblox. The ML classifier also flagged this PDF as malicious with high confidence.

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/coin-master-free-cards-game-hack
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/roblox-hack-jailbraik_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/can-hacking-in-roblox-get-youarrested_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/hack-peoples-accounts-oh-roblox_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/promo-codes-for-free-robux_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/forts-update-the-northern-frontier-roblox-hack_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/roblox-free-robux-hack_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/what-to-do-if-your-roblox-account-got-hacked_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/roblox-free-robux-no-verification_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/pubg-uc-not-received_GM1330123889.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/minecraft-mobile-free_GM479516143.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-robux-nicsterv_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/roblox-com-free-robux_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/fd-hacks-roblox_GM431946152.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://perpustakaan.fe.unismabekasi.ac.id/katalog-buku/repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000359b.bin
f26251e2052a6832d0a0984c32ec4ee0fd1e00c65e4d6081466358580ee7cf6c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x359B 23344 bytes
font_01_sfnt_off00006a2d.bin
da47515c3b4c9ce74a6a7925be58a2cec6625ddcee19f7c3d533689243930cbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2D 18172 bytes

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