Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c61d12ffaf1fa1f…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 21:08:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1e4159e567747240559de8fe0fa8e18d SHA-1: f866508dfdbbbc3d9a3826209638b639afd2858a SHA-256: 7c61d12ffaf1fa1f982be47e73fcc10daaab5818330332300f93064692aa115f
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are structured as a link farm, suggesting an attempt to drive traffic to various resources. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading or accessing potentially harmful content. The document body, though heavily obfuscated, contains references to 'Coin Master Hack Apk' and a URL pointing to a similar download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-35-16-hack-apk-game-hack
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-for-kids-no-verification_GM431946152.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/free-foxy-food-coin-master_GM406889139.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/free-minecraft-account-generator_GM479516143.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/free-roblox-intros_GM431946152.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-app-for-free-spins_GM406889139.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/is-roblox-free-on-nintendo-switch_GM431946152.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/cool-free-minecraft-skins_GM479516143.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-free-spin-no-offers_GM406889139.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/free-tiktok-followers_GM835599320.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/robloxmatchcom-free-robux_GM431946152.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes_GM431946152.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/classic-minecraft-net-hacks_GM479516143.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-computer-hack_GM406889139.pdf
    • http://man2tasikmalaya.sch.id/__statics/gudangsoal/files/wizard-hacks_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005125.bin
7f515db46252b0b4f96f54bcce246be92989c7b0109c1962c2929b05a57fa83c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5125 24396 bytes
font_01_sfnt_off00008910.bin
e07d0cbad2e1454141a39f730c702076d2e41c5ee7baae5ddda1e04aaa939d2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8910 18472 bytes

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