Malicious PDF — malware analysis report

Static analysis result for SHA-256 b081e405e2f64451…

MALICIOUS

PDF

33.4 KB Created: 2021-05-24 21:39:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fa011f5dd073b57d34b6cb76a39dcef2 SHA-1: c895002e907a381f951ceb3002d240832a05dfbd SHA-256: b081e405e2f64451fe17d568585616e2c673cdcdc2025a593f67dc1c2a1f4923
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic firing for a 'free generator / game hack' lure, directing users to a suspicious URL. The document body also contains text and links related to obtaining free game currency or hacks, reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a potential for JavaScript execution or redirection to a malicious site designed to exploit user interest in free game items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9509

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/835599320/tiktok-fans-free-game-hack PDF link annotation
    • https://www.guterdj.de/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://www.guterdj.de/images/free-robux-now_GM431946152.pdfIn PDF document text
    • https://www.guterdj.de/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.guterdj.de/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • https://www.guterdj.de/images/apps-to-get-free-robux_GM431946152.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
font_00_sfnt_off00002cfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFE 23644 bytes
SHA-256: 1736c9a8612ee1af235405b5e9257f1ae6636ad7c1395c325f0baaf37bb3587e
font_01_sfnt_off000062cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CB 17684 bytes
SHA-256: 22325babc2251f8239949cad6d45cc43a88f66264b3c8ea65c603fce63084c3f

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