Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbfb0e61185e3ff7…

MALICIOUS

PDF

44.3 KB Created: 2021-06-08 11:00:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 325f05a07474874979146e46b3cb7bad SHA-1: 95db1d3990a2bc12604ab06ac33e134f13ddec1d SHA-256: dbfb0e61185e3ff72ebf7437ddf9297e09f97d64e50a87e364feaa1e0b36c9a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free Robux' or 'game hacks' to lure victims. The primary malicious URL identified is https://netcdn.tw/app/431946152/free-robux-in-roblox-generator-game-hack. The document's structure and embedded links strongly suggest it is designed to lead users to potentially harmful websites, likely for credential harvesting or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-robux-in-roblox-generator-game-hack In PDF document text
    • http://ines.co.rs/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-hack-game-download-ios_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • http://ines.co.rs/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/las-mejores-paginas-de-hacks-de-roblox_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/game-hunters-coin-master-free-spins_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
font_00_sfnt_off00004f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5B 26552 bytes
SHA-256: 650c2ea4b72fa3b7ac3e4d7c2e62bca4e4a92970a66a8e05e137cbd0d711e461
font_01_sfnt_off00008a43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A43 18420 bytes
SHA-256: 1364172f89003f9d2a25afaa9ad04b53d45b53875a5c64d4244e56dc61d19ab6

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