Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ec69548adf36e3…

MALICIOUS

PDF

42.8 KB Created: 2021-05-12 16:34:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 953ff54432a9a0909f4881198151019a SHA-1: 30ca04665bbd2af635253c41bd0d0804be57cecf SHA-256: a1ec69548adf36e3c77f03446056e9999f83c7cf6ea875ea633b9e9b0f71281c
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which appear to be SEO-optimized lures for game-related cheats or hacks. One specific URL, https://netcdn.xyz/app/479516143/wurst-client-1.12-2-game-hack, is directly embedded and likely serves as a download for a malicious tool. The presence of a 'download button' heuristic further supports the malicious intent of directing users to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/wurst-client-1.12-2-game-hack
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-2021_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work_GM431946152.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-generator-no-verification-2021_GM431946152.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-no-fb-login_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/robux-gift-card-free_GM431946152.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/minecraft-free-no-download_GM479516143.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-hack-version-apk-download_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/boost9-com-roblox-hack_GM431946152.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/daily-spin-and-coin_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-spins-coin-master-daily_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-verification_GM431946152.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/win-free-robux_GM431946152.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-gift-card-generator_GM431946152.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-apk-download_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/roblox-free-robux-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cfa.bin
0bf011a6b8c6c51c10466ec95567ebe540d52293bb3fcce71cc1879e9b0c102e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CFA 25152 bytes
font_01_sfnt_off00008613.bin
311fa6a3c8ed3152b86259a6f2b4fd65ad6ae6b737d77785fc3ef6c3d9292616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8613 18048 bytes

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