Malicious PDF — malware analysis report

Static analysis result for SHA-256 55958df6b0314837…

MALICIOUS

PDF

42.1 KB Created: 2021-05-11 00:32:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 39f500d11752bdceff7c415957fc7559 SHA-1: 21f11f958a326cb067e0a55cffdcde7c6e11e91e SHA-256: 55958df6b0314837920aaee495d92fcddca8bdf81eed5f96e9180c0724f81160
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/minecraft-windows-10-free-code-game-hack PDF link annotation
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/robux-2021_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/roblox-18_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/coin-master-hack-download-2021_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.manmabar.sch.id/__statics/gudangsoal/files/free-robux-android_GM431946152.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
font_00_sfnt_off0000498c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x498C 24920 bytes
SHA-256: e7e022df9d6027ab8a4972aa428ee1780341b28d76d3452bbbb760ef26388a50
font_01_sfnt_off0000815f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815F 18524 bytes
SHA-256: 61f4e129dbb086a6f9797ef369c55cdd3b58d633037fca8f4f59eaf5785788a4

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