Malicious PDF — malware analysis report

Static analysis result for SHA-256 59cfb270c9e8c166…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 09:17:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 32aa05181308bb020227405a6844f77a SHA-1: c77b24279c36bca3f2d928ac259a853f76dcf80f SHA-256: 59cfb270c9e8c166305ff44aa8d96711769ebe5ded289580434c6347fbb10ec3
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 0.9748

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/406889139/20-free-spins-coin-master-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/coin-master-invite-friends-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/are-robux-generators-safe_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-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-nintendo-switch-digital-code-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-crosshair-decal-hacked_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-tiktok-app_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/easy-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-gear_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spin-coin-master-2021-link_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_off0000507a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x507A 24588 bytes
SHA-256: a3155b8e9b43cb1ccfc46b7fa5564a5c7dcd5482c941eca1b2cd3c27128fa4f1
font_01_sfnt_off0000890a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x890A 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000092f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92F4 18180 bytes
SHA-256: 322b0d5b629f6df55fd3c77851cbfe7ee71104dfe1b9214827344950ced1d0df

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