Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d7bb3e70c148fbf…

MALICIOUS

PDF

34.1 KB Created: 2021-06-29 18:55:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9bd00cde39b7094f1d571dbf051d3932 SHA-1: 838cfd3bc1bc3c872bd18cb6e38090baa6bc197b SHA-256: 4d7bb3e70c148fbf290d347b0f14c186f0e296addecd695543f3e6fbdb0c019b
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and text that promote free Robux, Coin Master spins, and game hacks, indicating a lure for potentially malicious downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports this assessment. Although no scripts were explicitly extracted, the document's structure and content suggest it's designed to trick users into downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/get-20212021202120212021202100-free-robux-game-hack
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-iphone_GM406889139.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/coin-master-club-hack_GM406889139.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/20210-free-spin-links-for-coin-master_GM406889139.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-link_GM406889139.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/coin-master-admin-free-spins_GM406889139.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/roblox-fortnite-hacks_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/free-links-to-coin-master_GM406889139.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/withdraw-robux_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/actual-working-roblox-hacks_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/free-minecraft-mods-for-xbox-one_GM479516143.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/freer-pro-tiktok_GM835599320.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/how-to-change-roblox-name-for-free_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/free-robux-only-1-step_GM431946152.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/coin-master-35-16-hack-apk_GM406889139.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/get-free-food-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fdf.bin
246982c0eb7e6003d6270c21730e65e2629e1bdf45834e0b30a51f49d3652251		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDF 21560 bytes
font_01_sfnt_off00005f64.bin
72a1a6f9c60ee8ab31e411e7d4f0a16423654e41accf8ca5cc7b8a0b707f6df3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F64 19224 bytes

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