Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc5ba75ee06c347…

MALICIOUS

PDF

43.8 KB Created: 2021-05-12 18:46:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bab71b2012b016b4fc263df01c2a0f25 SHA-1: 1329189553946101fc35f206666839243796152c SHA-256: abc5ba75ee06c347900a0cb7d84e06577acc125e36b515596e814f96e2b70d3b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document body and heuristics indicate a credential phishing lure, impersonating PayPal to trick users into clicking a link for free Robux. The embedded URL leads to a domain unrelated to PayPal, suggesting a malicious redirection. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs indicates potential exploitation or further payload delivery.

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/how-to-get-free-robux-without-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/how-to-get-free-robux-without-human-verification-game-hack PDF link annotation
    • http://bibliodetki.ru/images/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://bibliodetki.ru/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/whats-robux_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/roblox-hax_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://bibliodetki.ru/images/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/daily-spins-coin-master_GM406889139.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_off000048ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48AC 26876 bytes
SHA-256: fc1e3c6568fd702936856dae2f3916c462c417f400f91b329245bbcb461b8374
font_01_sfnt_off0000859e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859E 19388 bytes
SHA-256: c7994a70f951e7a274445218605a0e5dad46067da7d3a89c75279f94e76bcfde

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