Malicious PDF — malware analysis report

Static analysis result for SHA-256 e356ae8bf31e9ac5…

MALICIOUS

PDF

43.8 KB Created: 2021-05-17 04:37:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b9f08a78de96e3afab72d93f457d0a93 SHA-1: 2f13a41ae1841d0902c203eb56f8fe873f1f7b44 SHA-256: e356ae8bf31e9ac5656ff6af145cbbe1151aae3c5f5a8cb3196cf7bc778909a8
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically promoting game hacks and generators. The document body and embedded links strongly suggest a lure to a phishing or scam website. While no scripts were directly extracted, the PDF structure and heuristics indicate it's designed to exploit vulnerabilities or trick users into navigating to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/coin-master-free-2021-game-hack In PDF document text
    • http://vibrato.fr/images/free-robux-download_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/collect-robux_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-hack-coins-in-mcpe-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_off00004b53.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B53 30316 bytes
SHA-256: dd636135212c9df5d9444f424913d6a195c8937d96e9af3ffdf9fdd765f4a1e4
font_01_sfnt_off00008997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8997 18112 bytes
SHA-256: d3290bf375094f68ca2c73f068de3958d05aa7629a05aa779b6fc584462feea2

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