Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f872628e98c74a…

MALICIOUS

PDF

48.2 KB Created: 2021-06-04 00:17:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 40d3bb8f2a69042bfe402e67d5244ab9 SHA-1: d79261d867794b07e13fca71e9b2fb61df16ad5a SHA-256: 41f872628e98c74a218d9078a8c8381eeb464cf5f2cd35b824e6ef18b2285d25
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 0.9796

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/431946152/free-robux-please-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/pubg-30-uc-buy_GM1330123889.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-controversy_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ee0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EE0 26120 bytes
SHA-256: a1110872644575e56ea12fe4a5a4b978e4aff4fa785bea32b5242f1000e8cecc
font_01_sfnt_off00008bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCC 4076 bytes
SHA-256: e61ba0bc87ec5ef111fe6333f0a2f3ee7385c6605a97e6faa7bbf7363c3d8b95
font_02_sfnt_off00009930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9930 18472 bytes
SHA-256: a4143b220e35e332e52efa777ecf598d1a164c1d6c5ab1887881bf2674d2e637

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