Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4d3656facdba81…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 06:24:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2648c8feb2101684c3d10d89850efa79 SHA-1: c2d28b36fa449843e589974f6eca23b447011e59 SHA-256: 1c4d3656facdba8150bfda8f6bfc616802548671a337dfa52eb3e1c01c339fce
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 0.9865

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.online/app/406889139/blogspot-coin-master-free-spins-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-com_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/pubg-uc-no-human-verification_GM1330123889.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/tiktok-free-on-google_GM835599320.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/robux-only_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-without-doing-anything_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
stream_004_off000052fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FB 25120 bytes
SHA-256: e9b4a0a87e372dccbcd9afe8b15857bb7b3f8426c4cb99da0cca224248d0e966
font_01_sfnt_off00008c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9B 18464 bytes
SHA-256: af5d8a2e7c6ce5c46c231007036c3c30da92f088fd5d2b237af1a5c438451922

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