Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c8d5b2b2b0e3a39…

MALICIOUS

PDF

37.4 KB Created: 2021-05-20 17:09:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 85f8424e00d961b71227e5a715fdbe12 SHA-1: d072a641b8f3c41479a818b1cbb77cb3c961e1dd SHA-256: 4c8d5b2b2b0e3a39ddae83522884e26847c65156600043bec270bc3f62b902d3
160 Risk Score

Malware Insights

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

The PDF document contains multiple links designed to lure users into clicking on them by promising free game currency or hacks. One of the primary links, 'https://netcdn.xyz/app/431946152/hey-google-how-do-you-get-free-robux-game-hack', is identified as a malicious redirector. The document body also contains a call-to-action phrase, reinforcing the deceptive nature of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/431946152/hey-google-how-do-you-get-free-robux-game-hack In PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsbuluspesantren.sch.id/__statics/gudangsoal/files/facebook-coin-master-hack_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_off00003185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3185 27000 bytes
SHA-256: 9edea0b49f9e9be4d83ed89a435c81ba02bcb04d262c4b3c8d06a9182d4442a5
font_01_sfnt_off00006e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E29 19156 bytes
SHA-256: 2eaf05fb5b81c851c34d40d7c07e26ddd9b324a9c4f95fd917841cb6815dc612

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