Malicious PDF — malware analysis report

Static analysis result for SHA-256 f031c89263c6c5d9…

MALICIOUS

PDF

49.3 KB Created: 2021-06-14 01:28:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 71672c53c967bbd6ae3c702c38dec8c2 SHA-1: 6f7ff277eabc4d1902af41fa45d1ab82ca25cd48 SHA-256: f031c89263c6c5d953bc4eae77350aae29f99b8b55bcfb9c02ba55c5ec57446b
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which are SEO-optimized and point to sites offering game-related cheats and hacks. The primary URL, http://netcdn.co/app/431946152/free-robux-android-game-game-hack, suggests a lure for downloading a malicious application disguised as a free Robux generator. The document body and heuristics confirm the intent to redirect users to external resources, likely for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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.co/app/431946152/free-robux-android-game-game-hack
    • http://libsmpn1balongpo.sch.id/repository/roblox-robux-and-tix-hack-rtm-tool_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/roblox-hack-me_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/best-free-minecraft-server-hosting_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id//repository/can-you-really-hack-coin-master-ios_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/claim-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-do-you-get-free-roblox-money_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id/repository/roblox-cheat-engine-bypass-december_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-game-free-spin-download_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id/repository/how-to-get-robux-for-free-simpl-steps_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-can-you-get-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/roblox-hack-mobile-generator-net_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/getting-free-robux-by-using-inspect-element_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/robux-hack-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/minecraft-free-apk-java-edition_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id/repository/2021-fe-hacks-roblox_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-link-today_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id/repository/roblox-explorer-hack-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-2021_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/oprewards-com-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c69.bin
3d2340625367f3b722b9f1a719a63f4caae7255f859a774ff3933c7e69c5eedf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C69 24924 bytes
font_01_sfnt_off000085b7.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85B7 2824 bytes
font_02_sfnt_off00008f61.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F61 5696 bytes
font_03_sfnt_off00009c73.bin
b953ec9050a5ba4d15f350a0f01374b9870067e3f113fb9ae97e5c137a6b5d2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C73 18796 bytes

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