Malicious PDF — malware analysis report

Static analysis result for SHA-256 0705f80672e8d7fc…

MALICIOUS

PDF

45.2 KB Created: 2021-06-08 23:07:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c2ae336c0b99b4c592cf85232177363e SHA-1: 0db296b22ca754dd85cf9820331639545e03383d SHA-256: 0705f80672e8d7fcc96fe849cb57952a8f7e00413fd18c9166e864dff5757fae
62 Risk Score

Malware Insights

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

The PDF document contains a clear call-to-action to download "Roblox Studio 2021" via a link, which is a common lure for distributing malware. The ML classifier strongly flagged this PDF as malicious, and the presence of an external URI further supports a malicious intent to redirect the user to a potentially harmful download. The document body, though partially corrupted, contains the URL and references to the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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-download-roblox-studio-2021-game-hack
    • https://library.sman1berau.sch.id/repository/pubg-uc-ykleme-midasbuy_GM1330123889.pdf
    • https://library.sman1berau.sch.id/repository/static-moonactive_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/websites-to-get-free-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/free-robux-redeem-codes_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/roblox-report-hacker_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/roblox-comroblox_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/show-me-how-to-get-free-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-games-like-minecraft_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/best-free-robux-sites_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/identity-fraud-roblox-hack-script-pastebin_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/op-rewards-free-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/free-pet-treats-coin-master_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/app-for-free-spins-on-coin-master_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-robux-generator-codes_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/easy-robux-today-com_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-games_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/free-robux-mobile_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052d9.bin
4ed1a0a7373c2ed9e17d7cc9ba4e75f6371f44c60427c3837ab2abfd565175aa		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D9 24244 bytes
font_01_sfnt_off00008a6b.bin
60233bb9d8a2dd10762e6a39fe9caed76f3e9228895395dd409ae3c8988de1b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6B 19448 bytes

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