Malicious PDF — malware analysis report

Static analysis result for SHA-256 358fb4586acff4c2…

MALICIOUS

PDF

39.2 KB Created: 2021-05-10 18:01:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 51f9acfc4b5d0c6d42db9a53e0775e41 SHA-1: dbb114a1bfb9bf183e7dd60dc7819d341b734d3b SHA-256: 358fb4586acff4c28cce38fa7f03df3e18866f66933dc56ff318745fdfefe611
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a document body that impersonates brands like Coin Master and Facebook to lure users into clicking malicious links. The primary URL, https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-link-haktuts-game-hack, is presented as a way to get free spins, which is a common tactic for credential harvesting or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/coin-master-daily-free-spins-link-haktuts-game-hack.
  • 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/coin-master-daily-free-spins-link-haktuts-game-hack PDF link annotation
    • http://dygmotors.com.py/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/minecraft-servers-that-allow-hacks_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_off00003fd0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3FD0 23936 bytes
SHA-256: a06e6b3c99512372df7c941090b26644e7e3afa4fc5a2c086b1acf17f7344a8a
font_01_sfnt_off0000764a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764A 18620 bytes
SHA-256: b3c31be8a1333c3d9df8c736a52b75e17047f38808bb656eb58e4e4bec5e9b22

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