Malicious PDF — malware analysis report

Static analysis result for SHA-256 c348db7535ce5b88…

MALICIOUS

PDF

41.0 KB Created: 2021-05-15 05:38:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9feea9f0adb357178df3c2cdd7868185 SHA-1: c0bdf18f2f854272b748667f219d4454767b7934 SHA-256: c348db7535ce5b88ee9f574f37b35241b757d69d78c09345381a67ad4116c0a1
90 Risk Score

Malware Insights

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

This PDF file exhibits high confidence maliciousness based on ML classification and heuristic firings. It impersonates PayPal to lure users into clicking a link for "Roblox Hack iOS", which is a common tactic for credential phishing or distributing further malware. The embedded link `https://netcdn.xyz/app/431946152/roblox-hack-ios-game-hack` is suspicious and does not match the impersonated brand, indicating a likely phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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/roblox-hack-ios-game-hack.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/roblox-hack-ios-game-hack PDF link annotation
    • http://sfera-express.ru/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sfera-express.ru/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://sfera-express.ru/images/coin-master-card-hack-apk_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_off000046f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46F8 24100 bytes
SHA-256: a8f75fa07bdea4df6c3aa6c372ee9d902e6e8ecd9b45b6413be8b82851c68780
font_01_sfnt_off00007df9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF9 18184 bytes
SHA-256: f12c7157a0abee9a7103123c9d307fa47fe2494659220a603733cc764a4b7828

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