Malicious PDF — malware analysis report

Static analysis result for SHA-256 2114a986cc83890b…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 08:14:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a7707e5ec3a32216ca82266592fa4e84 SHA-1: 5522f290bf84a949341b6b73f4402603a18821cd SHA-256: 2114a986cc83890b0c2570c9547fe241e670dfc23349015f9b7e2dc4abced139
82 Risk Score

Malware Insights

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

This PDF document contains a lure impersonating Facebook, directing users to a URL that promises free in-game items. The ML classifier strongly flagged this PDF as malicious, and the embedded URL is associated with brand-impersonation credential phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to exploit user interest in online games and social media to redirect them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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: http://netcdn.tw/app/431946152/free-run-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 http://netcdn.tw/app/431946152/free-run-roblox-game-hack PDF link annotation
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://lib.smpn1bambanglipuro.sch.id/repository/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000320f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x320F 22260 bytes
SHA-256: a7aa2fc8a74ba68e468223e5a1b4650b02d6787649aae46ebe4e5db6c5a9fe60
font_01_sfnt_off0000637c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637C 18604 bytes
SHA-256: daf289c649dcec27a9098091cc65a54b35e35fdbb095b8ba0945593b746b35d9

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