Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab91151418ec7787…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 00:53:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 14ab8b6b64172d5ebe52644cf2a2430f SHA-1: b40854b4642153788a221741fea7a6ee54c93d05 SHA-256: ab91151418ec7787d18efd7279c647b85654551e43195b12db82ec527d0535bb
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are related to game cheats and hacks for popular games like Coin Master and Roblox. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-optimized PDF links suggests a link farm designed to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

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-spins-and-coins-coin-master-2021-game-hack
    • http://otomasi.stikesmuhgombong.ac.id/repository/coin-master-hack-link-2021_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-free-spins-link-2021-ios_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/may-2021-best-free-roblox-exploit_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/how-does-a-roblox-account-get-hacked_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id//repository/hack-avatar_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/how-to-get-free-robux-and-tix-no-hack_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id//repository/get-minecraft-windows-10-free_GM479516143.pdf
    • http://otomasi.stikesmuhgombong.ac.id//repository/how-to-get-free-hair-in-roblox_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/how-to-hack-in-roblox-2021-may-19_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-free-coins-hack_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/cheats-for-ice-cream-simulator-roblox_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id//repository/free-roblox-wings_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/free-robux-batu-kol-faki_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/gameblox-free-robux_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/easy-roblox-today_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/roblox-console-inspect-command-hack_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/free-role-in-coin-master_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/how-to-create-clan-in-roblox-for-free_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/roblox-free-shoulder-friend_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002fca.bin
22184a442348f47d8107db79e018866f3db2153bc431f642a0dde64eebeb7bcf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FCA 23628 bytes
font_01_sfnt_off00006536.bin
7795d195d4be0492985176f7df642c4311e2f9707fbc322b3e968b874a04c091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6536 18752 bytes

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