Malicious PDF — malware analysis report

Static analysis result for SHA-256 abddd9ce8647bb25…

MALICIOUS

PDF

37.4 KB Created: 2021-05-22 22:37:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: db27820ffa2fce5eb239b571a23f05cd SHA-1: ea0e92ccbed59ef23a1ac29ccc6d06992689e681 SHA-256: abddd9ce8647bb25d6bcbd2301b0470111dafa8569d02372cb1e61eaf7940208
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it links to external websites, specifically a 'free generator / game hack' lure. The document body also contains URLs and phrases related to obtaining free Robux and other game-related benefits, suggesting a scam or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious lure designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • 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.
  • 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/how-to-get-free-robux-without-doing-anything-game-hack PDF link annotation
    • http://atiltd.com.tw/upload/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://atiltd.com.tw/upload/files/free-attacks-on-coin-master_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_002_off000031e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E8 25644 bytes
SHA-256: 9d610777f5971b47071b92a56688942c0d2fb048d4119ae6e5ece59e222fa2ca
font_01_sfnt_off00006dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAD 19400 bytes
SHA-256: 843e7c6de0628ecb74dfde19cdfb212261a67f0d6d996bc16e2547f6c0bce3d3

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