Malicious PDF — malware analysis report

Static analysis result for SHA-256 c987fee71c1bab72…

MALICIOUS

PDF

42.5 KB Created: 2021-05-12 16:30:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 04294cf23d8cf65e97499f620608c7f6 SHA-1: 0169186d74a4dd88c8f8779620c67c48074b2406 SHA-256: c987fee71c1bab72dfaf53a0f07d127b8032c192ed7e5258e0beda628839bee8
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/431946152/free-robux-no-verification-or-survey-game-hack PDF link annotation
    • http://perpustakaan.pn-temanggung.go.id/repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/roblox-rules_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-temanggung.go.id/repository/real-minecraft-for-free_GM479516143.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_off000047bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47BC 25228 bytes
SHA-256: fe0aee16c32894d78ab14eaca0794d6f8b07c3e06c8475066db1b0b3a11cfa77
font_01_sfnt_off000081b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B2 18892 bytes
SHA-256: 85e8471d4bb7809b16494b43ecc998cec7f87bafeaec38a3001510264e72f0e6

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