Malicious PDF — malware analysis report

Static analysis result for SHA-256 66243ca10ee8d735…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 23:46:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4bb5f14958c670f191fea50f153e5d85 SHA-1: 10970655bf0bc0682f26c9fceaeecb8261de3fc7 SHA-256: 66243ca10ee8d735f911772602df68bb3c76ead2f4debf0d47a7b070ed9de073
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and a document body that explicitly advertises 'free spins on Coin Master' and 'game hacks'. The primary link directs to a URL associated with such lures, indicating a phishing or scam attempt. While no scripts were extracted, the presence of malicious links and the ML classifier's high confidence suggest a high likelihood of this document being used to distribute malware or lead users to malicious websites.

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/links-to-get-free-spins-on-coin-master-game-hack PDF link annotation
    • http://perpustakaan.bundadelimalampung.ac.id/repository/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/pokemon-go-free-download-play-store_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/haktuts-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://perpustakaan.bundadelimalampung.ac.id/repository/download-hacked-games-coin-master_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_004_off00005044.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5044 24300 bytes
SHA-256: 74c0548a5328f157a9bab1d9a64c227a47e5537263856844b576d3b52de738dd
font_01_sfnt_off000087e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E1 18056 bytes
SHA-256: 09d5214532ffde87c42515cbc4f454f72aa6a3fcd547f3e5323fe8ee16367066

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