Malicious PDF — malware analysis report

Static analysis result for SHA-256 8475e6a4366dfb68…

MALICIOUS

PDF

35.5 KB Created: 2021-05-21 22:39:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d465aac3059255251ea47568cba59834 SHA-1: 54a267999e6f3a3763c540921db1b66d03481e12 SHA-256: 8475e6a4366dfb6814bfd8e988a97b46fc1f596f3798faed16ef856cdbc8f372
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 heuristics indicating a lure for game hacks and brand impersonation (Facebook) to facilitate credential phishing. The embedded links, such as 'https://netcdn.xyz/app/835599320/tiktok-likes-for-free-game-hack', likely lead to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content, possibly exploiting client execution vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/835599320/tiktok-likes-for-free-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/835599320/tiktok-likes-for-free-game-hack PDF link annotation
    • http://j-cook.pro/images/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/free-robux-kid-friendly-no-human-verification_GM431946152.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
stream_002_off00002f7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F7D 27428 bytes
SHA-256: cde2feb91b98af6fd7fba9b1f9a5a72a2662d6664fccd024739850d8ce8b8f06
font_01_sfnt_off00006be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE6 17456 bytes
SHA-256: 6bc07a916d4e04dd857b15fc22f6a85a1633f574b63a4730ea8dc15634c660b5

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