Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a92f36a89ca1c15…

MALICIOUS

PDF

36.0 KB Created: 2021-06-27 13:49:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2ec391b6ed48e120e0b53bff571b302e SHA-1: 85e7efade503689c73dc2def5092e7a1d375554c SHA-256: 7a92f36a89ca1c15b136fd716ae45462dddecef0d1d78fafdd59e4d78596656d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text that lure users into downloading game-related cheats and accounts, such as 'free Roblox accounts'. The presence of a 'password-protected archive lure' heuristic suggests the downloaded content may be encrypted to evade initial detection. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-roblox-accounts-pastebin-2021-game-hack PDF link annotation
    • https://wald-match.com.tw/upload/files/roblox-free-anamations_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/grabpoints-robux_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/haxteam-free-robux_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/pokemon-go-free-coins-2021_GM1094591345.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/hack-electric-state-darkrp-beta-roblox_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/como-instalar-hacks-en-roblox_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/get-free-800-robux_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • https://wald-match.com.tw/upload/files/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3406 22540 bytes
SHA-256: 0b7bbceab2802a228c47c322d7092231ad4ca14641fdc5f7327d53ba8ab829c8
font_01_sfnt_off00006623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6623 19568 bytes
SHA-256: 8b1500a533889892eaac992ceb9a50b16bdf7ca023904a7e628510c3965b81b3

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