Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c90649bf658b3c…

MALICIOUS

PDF

44.1 KB Created: 2021-06-14 00:31:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 63b47c4a52c55a882afaf5b61f64b7f4 SHA-1: 7a9b46d86eeb9c73077fef38d49acc37c1399318 SHA-256: 84c90649bf658b3cd1dbefe2e3827083f564a33e874961269a9cea9544142247
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a link farm, many of which point to pages offering game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of urgency and download button lures further supports a malicious intent. The primary URL http://netcdn.co/app/431946152/cryptic-roblox-hacks-game-hack is likely a landing page for a malware download or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/cryptic-roblox-hacks-game-hack
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/do-coin-master-hacks-work_GM406889139.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-apk_GM406889139.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/roblox-noob-outfit-for-free_GM431946152.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/free-minecraft-codes_GM479516143.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/roblox-studio-free-robux_GM431946152.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/minecraft-free-download-iphone_GM479516143.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/coin-master-free-spin-group_GM406889139.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/free-dominus-roblox-real_GM431946152.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/spins-gratis-coin-master-hoy_GM406889139.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/coin-master-35-2-hack_GM406889139.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/coin-master-free-coins-2021_GM406889139.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/daily-free-spin-link-in-coin-master_GM406889139.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/coin-master-hack-pc-download_GM406889139.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/roblox-hack-unlimited-robux_GM431946152.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/tiktok-free-to-watch-online_GM835599320.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/haktuts-coin-master_GM406889139.pdf
    • https://www.elearning.mtsnegeri12banyuwangi.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-app-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aea.bin
3ead6f4eb4f06ffe3687a1d71c5995dfa784f88265ea94f0f76b4e40137bb260		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AEA 26104 bytes
font_01_sfnt_off00008744.bin
759065d62e831ceaab2edf055d9346d4ce29df40f3d2d3d8be1e8c64de5cde50		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8744 19192 bytes

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