Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab5babaa6362c5b…

MALICIOUS

PDF

42.8 KB Created: 2021-05-18 03:29:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 49127ec0db963bd890b6295f8849c952 SHA-1: e2e31615127b5832c5ea7704aab75b0eb9830462 SHA-256: 3ab5babaa6362c5bd591ac2706fa80101fc1ef0b2ca8b50f74c9d9c6ee8dd86d
122 Risk Score

Malware Insights

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

The PDF document contains a lure related to "Free T Shirt Roblox" and impersonates Amazon, directing users to a suspicious URL. Heuristics indicate this is a brand-impersonation credential phishing attempt, potentially abusing MFA. While no scripts were extracted, the embedded URLs and the nature of the lure strongly suggest a phishing attack designed to steal user credentials or session tokens.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/431946152/free-t-shirt-roblox-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/431946152/free-t-shirt-roblox-game-hack PDF link annotation
    • http://advancedaudiosystems.org/images/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/robux-withdraw_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://advancedaudiosystems.org/images/earnrobux_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
font_00_sfnt_off00004a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A6E 25204 bytes
SHA-256: 13c20099b523c31b214e7422a5b5e498ccd2586f2047d65f0f58f8a022fe8784
font_01_sfnt_off000084f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F3 18340 bytes
SHA-256: 2d05e254e9d88d662aa6e20ca1badb4d8e3c9bd921fc5d0ad34db7ef5b503ac5

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