Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cce079633e8c9ac…

MALICIOUS

PDF

43.9 KB Created: 2021-05-17 12:37:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9fc41116bbaa19c75c04d44c46044338 SHA-1: 179d5cf579681d383093e45b60eda5370f3a9a7b SHA-256: 7cce079633e8c9acf203f1dad5937e1c2fb8ef01686c22259384987e4fba7b5e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains a lure for free Robux, impersonating Microsoft and directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and brand impersonation for credential phishing confirms a malicious intent. Although no scripts were explicitly extracted, the document's structure and embedded URLs suggest it is designed to lead the user to a site that likely hosts further malicious content or attempts to harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/free-robux-websites-no-human-verification-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-robux-websites-no-human-verification-game-hack PDF link annotation
    • http://archi-z.ru/images/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://archi-z.ru/images/coin-master-hack-android_GM406889139.pdfIn PDF document text
    • http://archi-z.ru/images/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://archi-z.ru/images/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://archi-z.ru/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://archi-z.ru/images/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://archi-z.ru/images/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://archi-z.ru/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://archi-z.ru/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://archi-z.ru/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://archi-z.ru/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://archi-z.ru/images/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://archi-z.ru/images/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://archi-z.ru/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://archi-z.ru/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://archi-z.ru/images/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • http://archi-z.ru/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://archi-z.ru/images/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://archi-z.ru/images/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://archi-z.ru/images/how-to-get-free-robux-no-human-verification_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
stream_003_off000048b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B9 26388 bytes
SHA-256: 894c1f012c05a17d19faea7ee8791df8b8f1a2f269044ceb5782beba41fb8fe7
font_01_sfnt_off000086fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86FE 19056 bytes
SHA-256: b278ed256549c6e4f6c448dba943d0e72c7f64ebe7340c12334ea4705f26c648

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