Malicious PDF — malware analysis report

Static analysis result for SHA-256 113c6a61d3b1f087…

MALICIOUS

PDF

37.4 KB Created: 2021-05-21 08:55:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 863576fe5e9665366eb82ea05826179a SHA-1: cbb13fdde3f4e3392f87ccc53e63230a7956ab02 SHA-256: 113c6a61d3b1f087bbceec159139f54941ad7172236d4690beb8cf1008b777b8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that are disguised as game hacks and generators for popular mobile games like Coin Master and Roblox. The primary link, 'https://netcdn.xyz/app/406889139/coin-master-free-spin-and-coins-links-2021-game-hack', is flagged as a redirector lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

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/406889139/coin-master-free-spin-and-coins-links-2021-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-find-coin-master-free-spin-link_GM406889139.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_off00003812.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3812 24452 bytes
SHA-256: e08ffce624c144b18ca1330b85c2bb23cad969e4d00dd75fdb010e32f00fb47a
font_01_sfnt_off00006fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDB 18632 bytes
SHA-256: bf450557b00699bdc36230f8bff75cef2d4ddc3329c11821453b6bd8c7be45f9

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