Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9e34c1456714ee2…

MALICIOUS

PDF

45.6 KB Created: 2021-06-08 13:29:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: c1e8aca1458378e0a066bfc6e6d2f353 SHA-1: 37a93e3b9386440db4c3407d9cdac1c3136a7be2 SHA-256: e9e34c1456714ee240e84e12e412f46c9702923bd0cb6c3620838a01f8a49630
102 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a document body that promotes free items and cheats for popular games, aiming to trick users into downloading malicious content. The presence of a 'download button' lure and instructions for password-protected archives further supports a malicious intent to deliver a payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.tw/app/431946152/free-roblox-promo-codes-september-2021-game-hack PDF link annotation
    • https://ezgolfer.com.tw/image/data/files/pubg-uc-website-india_GM1330123889.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/roblox-but_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/pubg-uc-to-inr_GM1330123889.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://ezgolfer.com.tw/image/data/files/easy-way-to-get-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_off00005169.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5169 25440 bytes
SHA-256: 1db2af9263d88435d8409bc179d4af1d73aec395e692f6c271008ecb4863a1b7
font_01_sfnt_off00008cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD1 19216 bytes
SHA-256: 6da8b5adb3ee6230f5e7dbad072ec20d9484fb7e1ec149477c16cae4ce87ce95

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