Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10cbe53ab77ba39…

MALICIOUS

PDF

41.2 KB Created: 2021-05-04 07:59:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 35e1e08221abc71054400d04701ec553 SHA-1: 7c139c00edd4a6982af5a524325e3fa31946e6a9 SHA-256: c10cbe53ab77ba39147bf1d4bc183c94c9bdaa9b0e876c18c70676958285d77b
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a visual call-to-action button, impersonating Amazon to lure users into clicking a link for a "Free Roblox Hack". The primary malicious URL is https://netcdn.xyz/app/431946152/free-roblox-hack-dot-us-game-hack. While no scripts were explicitly extracted, the ML classifier and brand impersonation heuristics strongly indicate a credential phishing or malware download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9879

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-roblox-hack-dot-us-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-roblox-hack-dot-us-game-hack PDF link annotation
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-use-roblox-hack-scripts-free.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/como-hackear-jailbreak-roblox-2021.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/ancient-earth-hack-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/code-to-put-into-console-to-get-free-robux.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-turn-into-super-saiyan-roblox-no-hacks.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-password-finder-hack.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-create-a-vip-server-on-roblox-for-free.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/comment-hacker-robux.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/robloxlive-stream-roblox-hack.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/game-card-roblox-hack.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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
stream_003_off00003f50.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F50 27520 bytes
SHA-256: 1638d28ade8294f56c9da8f6a1ce3ec2dc4271f9bf7a767f93eded6b36a1ac31
font_01_sfnt_off00007dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAD 18804 bytes
SHA-256: bb45bcda58fcc37e9c25acbd9fe0937d0b8d3955d5f538050bfe2aee35cc0dc0

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