Malicious PDF — malware analysis report

Static analysis result for SHA-256 b879195d4fb518a3…

MALICIOUS

PDF

48.4 KB Created: 2021-05-19 10:00:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 66a572d29f843a3e9482e09a6a9d9e20 SHA-1: b46d1eddcb74f95f5c186c78fe41ab32e4338953 SHA-256: b879195d4fb518a38705dcc34d12a4c8ff223488263978603d97e03a9bf4051e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The document body and extracted URLs point towards lures for game cheats and free in-game currency, likely redirecting users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to direct users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/406889139/coin-master-free-spins-cheat-game-hack
    • https://perpus.uwhs.ac.id/repository/coin-master-free-coins-spins_GM406889139.pdf
    • https://perpus.uwhs.ac.id/repository/free-spins-on-coin-master_GM406889139.pdf
    • https://perpus.uwhs.ac.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdf
    • https://perpus.uwhs.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdf
    • https://perpus.uwhs.ac.id/repository/free-robux-today_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/update-coin-master-free-spins_GM406889139.pdf
    • https://perpus.uwhs.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • https://perpus.uwhs.ac.id/repository/roblox-robux_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/roblox-com-free-robux_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • https://perpus.uwhs.ac.id/repository/coin-master-free-spins--coins-2021_GM406889139.pdf
    • https://perpus.uwhs.ac.id/repository/coin-master-links-free-spins_GM406889139.pdf
    • https://perpus.uwhs.ac.id/repository/free-t-shirt-roblox_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/get-free-robux-now_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://perpus.uwhs.ac.id/repository/coin-master-free-gold-cards-link_GM406889139.pdf
    • https://perpus.uwhs.ac.id/repository/get-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d89.bin
125455bb445b1b20f37cf73a6f14cde696026412049de26aee50f4937f5b1095		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D89 33948 bytes
font_01_sfnt_off000091f8.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F8 2840 bytes
font_02_sfnt_off00009baa.bin
9bd717b0e04310867829ca511b483eebbd60050a5b8b31305794fbcb17f8519e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAA 18052 bytes

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