Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88e9eb52b81e481…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 07:08:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1fc95779ac8dfcd6b939771b9f5f4cd9 SHA-1: 19c1588dfc3d5aa04583c67ee8a45b683bbd52e4 SHA-256: b88e9eb52b81e481ced2ab0fff887c178c50a1d353cbe5a33c6af6ceb702c2fb
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 0.9980

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 http://netcdn.co/app/479516143/how-to-get-creative-mode-in-minecraft-server-hack-game-hack PDF link annotation
    • http://library.stipjakarta.ac.id/etd/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-report-a-hacker-that-hacked-your-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/hoq-to-buy-anything-from-catalog-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-robux-gift-card-youtube_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/btools-hack-pastbin-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/como-hackear-electric-state-rp-roblox_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/1k-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/coin-master-hack-2021-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/c-roblox-exploit-free_GM431946152.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://library.stipjakarta.ac.id/etd/repository/roblox-booga-booga-mojo-fly-hack-26-may_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_off0000342a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x342A 22528 bytes
SHA-256: ce539cc63a8f77bfde85b21bc34816f8c1e32d210ed3b5c76cc56e9b642583d2
font_01_sfnt_off0000659a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659A 18620 bytes
SHA-256: e9ae3ffdb85453ea0374ab223d3fde66ce2aaabe57ac171a5b8ae266564cfd25

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