Malicious PDF — malware analysis report

Static analysis result for SHA-256 539ef1de1b5a96ad…

MALICIOUS

PDF

33.7 KB Created: 2021-07-10 03:29:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 91fdccd705bfe2e424687dda9c3f8abd SHA-1: ad2c41a862adc8071e31c1a0823f56a204667091 SHA-256: 539ef1de1b5a96ad13fecbb5281ed9a1c71e8753292ca94c9f05fba13f044196
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a known malicious redirector infrastructure pointing to 'http://netcdn.tw/app/406889139/www-coin-master-hack-game-hack'. This lure is designed to trick users into believing they can obtain game hacks or generators. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted from this sample.

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.tw/app/406889139/www-coin-master-hack-game-hack In PDF document text
    • http://www.ma-plast.hr/files/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-roblox-party-favor-tags_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-roblox-exploits-mega_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/roblox-roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.ma-plast.hr/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/roblox-rape_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/robloxhacks_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/play-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/robux-hack-android-2021_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/lua-c-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/dragon-ball-final-stand-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/got-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-mod-apk-free-download_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_off00002e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E91 22476 bytes
SHA-256: 4dfdedd6b751cd4a9aa3a37c32f3954c61c992a705f8d9c0ff678b98d1907013
font_01_sfnt_off000060bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BC 18364 bytes
SHA-256: 56fe19c9a365f85bceb031ba69da7f92b878d4dc87b6111ff4a61486c3ab982f

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