Malicious PDF — malware analysis report

Static analysis result for SHA-256 0542ef129fbbc3dc…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 05:10:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 461ba3c7764e831093fb33c764435f3a SHA-1: a9dbd4597b3f1803e529db13ee80155070a7dbff SHA-256: 0542ef129fbbc3dcabc210266f6d799437fd33ea0034f2d9b2f7596b9bcf2bf0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to 'game hacking' and 'free spins' for Coin Master, directing users to external websites. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a social engineering tactic to trick users into visiting potentially malicious sites. While no scripts were explicitly extracted, the nature of the lures suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-game-hacking-game-hack PDF link annotation
    • https://www.iosas.info/uploaded_files/userfiles/files/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-get-free-robux-2021_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
stream_003_off00004ab3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB3 25004 bytes
SHA-256: 4f4274ad6248dc4898cd830b7cbda527edf7da272ad4d7b899e15f125e1ed56a
font_01_sfnt_off000083f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F9 18264 bytes
SHA-256: 62da0fdfc0c6032c2f0014be80ef488e4c1ececfe37f754bdf2231c0e671d3af