Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6beb1f50c9aeb41…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 16:55:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 67546b8f7a42e7078242628a65faf66f SHA-1: 36147670a2674c0d9b9fed8d372107cc2b49567b SHA-256: c6beb1f50c9aeb41a8e484f3fbe79a24451e7e8e4f6443595f759bdd2ae3626a
160 Risk Score

Malware Insights

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

This PDF document contains multiple links designed to lure users into clicking on what appear to be game hack generators or free currency sites. The primary link, http://netcdn.tw/app/406889139/coin-master-hack-no-survey-or-verification-game-hack, is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit user interest in free in-game items to redirect them to potentially malicious sites, likely for credential harvesting or further malware delivery.

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/coin-master-hack-no-survey-or-verification-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/robux-free-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hacks-roblox-descargar_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-consigue-robux-gratis-hoy_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/goku-ui-free-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/corn-master_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-coins-on-coin-master-hack_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_002_off00003164.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3164 23380 bytes
SHA-256: f28f5085c1894bc8d78fdc975406546667084a91ec0acd93e357c3baa627de47
font_01_sfnt_off00006627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6627 18572 bytes
SHA-256: 3714ff820157558559e7d0653201827560acd429746c0784f855fbf1e368d380

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