Malicious PDF — malware analysis report

Static analysis result for SHA-256 9278467da3c24128…

MALICIOUS

PDF

44.3 KB Created: 2021-06-04 01:32:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9aa7efc456374a1c44985ab0abc16533 SHA-1: 3b1fb5ddf88f4fd68844cd713dd28914ece06663 SHA-256: 9278467da3c2412892badcf0088f14aa393f49ae66e6380b4c5fefa22f4a77c5
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/coin-master-daily-free-spins-link-today-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.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-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spins-coin-master-app-iphone_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-pubg-uc-free_GM1330123889.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-unlimited-spin-apk-free-download_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_off0000501b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x501B 25392 bytes
SHA-256: 26c752d6ca6366cda91e262384ed69d9889912dcd29d5a5736607664437abc5e
font_01_sfnt_off0000893a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x893A 18652 bytes
SHA-256: b7acebacf47409c7f0f2932ba41e4c1dc120b4ef5280387cf9333091bd47b2e0

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