Malicious PDF — malware analysis report

Static analysis result for SHA-256 223ba5fba10e8742…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 17:04:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 67ed0037d43afc50c66397f129b54e2a SHA-1: 3133606eac6ae030794a6b53141d0c49247321bc SHA-256: 223ba5fba10e87429caaee4e2a3affc9f9f48e8a01c255ae53c2536a4c991474
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'generators'. The primary lure URL is https://netcdn.xyz/app/406889139/no-verification-coin-master-hack-game-hack, which is associated with a 'free generator / game hack' theme. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at redirecting users to potentially malicious sites, likely for further payload delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/no-verification-coin-master-hack-game-hack In PDF document text
    • http://ig-tauchen.de/images/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/gold-cards-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/generator-robux_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://ig-tauchen.de/images/make-free-robux_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/robux-xyz_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/robux-redeem_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://ig-tauchen.de/images/free-coin-and-spin-in-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_003_off00004787.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4787 29264 bytes
SHA-256: 16419ab2ebeb340b33e711e4941583ca0eaefdcf7a95e95a017bbade7e75cd54
font_01_sfnt_off000084d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84D9 17848 bytes
SHA-256: c3001f9265d4cf1937fc92e3f1fb9099104c29be551bd241451496bbb7f3a9b7

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