Malicious PDF — malware analysis report

Static analysis result for SHA-256 a58a0dc3bbe2d580…

MALICIOUS

PDF

39.7 KB Created: 2021-04-28 18:15:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 18e2b936865aa312cfc42703000c176a SHA-1: 1fa75758432c74292d0744670d8d0fe5ad4d51a0 SHA-256: a58a0dc3bbe2d58060a16ca6a0043c920942faabb8b58d2376e9e02b2e6c218e
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1071.001 Web Protocols

The PDF document contains multiple links that impersonate brands and lure users with promises of game hacks or generators. The primary link, 'https://netcdn.xyz/app/431946152/hack-roblox-reddit-game-hack', is associated with a brand-impersonation credential phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9443

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/hack-roblox-reddit-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/hack-roblox-reddit-game-hack PDF link annotation
    • https://www.bolsoshf.com/ckfinder/userfiles/files/how-to-hack-other-roblox-accounts.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-walk-through-walls-cheat-engine-jailbreak.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/roblox-noclip-no-cheat-engine.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/how-to-make-a-free-robux-hack.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/boku-no-roblox-remastered-hack-chose-quirks.pdfIn PDF document text
    • https://www.bolsoshf.com/ckfinder/userfiles/files/como-hackear-conta-de-roblox.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_off00003c73.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3C73 26144 bytes
SHA-256: 9b1b1d448fe769cec4c706b49eba24f828abf8dc4315463aa7e7a60fe1be89fd
font_01_sfnt_off000078af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78AF 18580 bytes
SHA-256: aeb4b7bac163b38fbacd66d8005e30f01fda431f106049531c7c6a7200ed78bb

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