Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf74fb533394914b…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 09:40:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 177592fb6b47bdcff9ad4bb089348986 SHA-1: 807318e5d714b5a8ab45281dc4421c7ae95d3cef SHA-256: cf74fb533394914bc0762df7e7635a7f9dc825bb9fc088d3487f577ccde820d8
82 Risk Score

Malware Insights

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

The document contains multiple embedded URLs and a prominent external URI pointing to sites offering game-related hacks and free items, indicative of a scam or malware distribution lure. The 'SE_CLICKFIX' heuristic suggests the document may attempt to trick the user into executing commands, likely to download and run a second-stage payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/free-private-minecraft-server-game-hack PDF link annotation
    • http://new-era.com.tw/image/data/files/minecraft-client_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/what-is-robux_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-2021-robux_GM431946152.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
stream_004_off00005229.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5229 28572 bytes
SHA-256: 024646a8de0317244b5b43adb05148e0a45e407b6f601120dd7a00c220c57cbd
font_01_sfnt_off000092fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92FB 17836 bytes
SHA-256: 7ff77ee3a78605da9ef85fec4605ea670974ab48e4ca839a7389016eb6bc2a09

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