Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3b5c44405e9183…

MALICIOUS

PDF

34.0 KB Created: 2021-06-17 22:23:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 59f232ef3b67a0e980d86d1e5e5c3e65 SHA-1: 7b60b8b7843259902f938ca4a29fd3696495bc90 SHA-256: ed3b5c44405e918393c0545aa4afa4c5604f7cb4cf7eb9d9ba399156e0f90ac2
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as free game hacks or generators. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious workflow. No scripts were extracted, but the document's structure and embedded URLs suggest it is designed to exploit user interest in free in-game items to lead them to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-new-free-hair-game-hack In PDF document text
    • http://maslabaou.com/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://maslabaou.com/images/dailyrobux_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/earn-roblox_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/win-free-robux_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://maslabaou.com/images/insert-gear-roblox-hack_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/easy-robux_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/how-to-get-hacks-in-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://maslabaou.com/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://maslabaou.com/images/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_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_off00002fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB1 22124 bytes
SHA-256: 1ab8a94ab9d55a78de426598b6b99851a50e5ffb7582b421ac9d436f26739cd6
font_01_sfnt_off000060ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EA 18748 bytes
SHA-256: 25d16f8b81fce426727b58dce1075432e940bbbe088bd60df94771e9cb6c3b29

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