Malicious PDF — malware analysis report

Static analysis result for SHA-256 437d9fc7aed1aa08…

MALICIOUS

PDF

53.4 KB Created: 2021-05-20 01:37:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 742b4269cf35bfa3e801b5e76eedbeb1 SHA-1: 407a4a26d8ca617b5780bd650582ca82f6838141 SHA-256: 437d9fc7aed1aa081c82c3dc5ceabd588f3506682f262f3defc6fd96aaee2cfb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document impersonates Apple and uses a "hacked client" lure to trick users into clicking a link. The primary malicious URL identified is https://netcdn.xyz/app/479516143/best-free-hacked-client-game-hack, which is hosted on a domain unrelated to the impersonated brand. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest a malicious intent to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9017

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/479516143/best-free-hacked-client-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/479516143/best-free-hacked-client-game-hack PDF link annotation
    • https://www.devries-group.de/images/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/pokemon-go-free-evolve-after-trade_GM1094591345.pdfIn PDF document text
    • https://www.devries-group.de/images/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.devries-group.de/images/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/can-pokemon-go-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • https://www.devries-group.de/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.devries-group.de/images/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C68 25788 bytes
SHA-256: f7bf0210cfa717c16612711f1bebf90b8a47f74946bfc64f3a2c6b3ebfdb4b25
font_01_sfnt_off00008750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8750 7936 bytes
SHA-256: 218d53b68bdddb064f6fba4be822d5b3725ed1cef1a3b42796a8dd99c4a62f4e
font_02_sfnt_off0000a079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA079 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off0000af05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF05 18200 bytes
SHA-256: f9e1919cba188461631b4d1f41fa639bbd05523e10553c39d41e2ec7b66d941b

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