Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ef3a3b1516f6b2…

MALICIOUS

PDF

43.3 KB Created: 2021-05-16 23:41:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8dd6760b4638ef0d1c056bcf0950e656 SHA-1: 557a6c38f69ed4b5f4cb13cfc691428a0a4b695a SHA-256: 33ef3a3b1516f6b2b308f5b5831d360c194ef51debab9ed3acb4a9ec0f902da4
102 Risk Score

Malware Insights

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

The document contains a critical heuristic firing for a 'Secret Recovery Lure', indicating it attempts to trick users into revealing sensitive information like private keys or backup codes. This is further supported by embedded URLs pointing to applications, suggesting a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.xyz/app/406889139/free-spin-apps-coin-master-game-hack PDF link annotation
    • http://www.isovca.com/images/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/free-pe_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/114-hacks_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/grab-points-login_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/games-like-minecraft-but-free_GM479516143.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_003_off00004c8c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C8C 25712 bytes
SHA-256: 7bcb24b1d854c30f46156c5b9f435f7ba814ef5315b18377a1f6df988dd04367
font_01_sfnt_off00008812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8812 17920 bytes
SHA-256: c91f58dff042425bd39551209570be374531c24fad93c4b840c062d659879362

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