Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13ad4464c7e6d5a…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 13:06:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 264c6536e9702654a04be952ce1cd797 SHA-1: e2d12ad9848bde98f6217bac86b9a1be4ccaa6be SHA-256: c13ad4464c7e6d5a1ccea26faa86d5bfc0a54b25d1097c3f48bbbf360225844a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirector URL is http://netcdn.tw/app/431946152/free-robux-glitch-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting 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/431946152/free-robux-glitch-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-30-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/discord-invite-for-hacked-swears-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-running-gamepass-parkour-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/jail-break-roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-money-cheat_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/pubg-uc-and-rp-generator_GM1330123889.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-spin-hack-pc_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_off00003235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3235 23216 bytes
SHA-256: b62d977af2eee18037e27096d25c6252149853560514736903d9a38ea68cc92d
font_01_sfnt_off0000669c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669C 19180 bytes
SHA-256: 4a662064efa2bd4954903d0e688b5cea29ffcd4305a5606eea95398cceacf406

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