Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed0f8c92a550f66…

MALICIOUS

PDF

43.3 KB Created: 2021-05-16 07:09:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1831f147c25bd3e15ef79477a63a90f5 SHA-1: 5bdd7377fcd8d7c25cfa93020b30957cd2b4a129 SHA-256: 4ed0f8c92a550f66d45214832f74797fe6fd2e54e72022eeb3c9efbfb50dd5fb
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 0.9969

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/479516143/free-minecraft-server-hosting-24-7-game-hack PDF link annotation
    • https://learnwmf.org/image/data/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-hack-apk-april-12-2021_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/best-hacked-client_GM479516143.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/robux-withdraw_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-realistic-minecraft-texture-packs_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
stream_003_off00004d63.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D63 25184 bytes
SHA-256: 2e88f8aa8ca845673c4fd5d741ea7c1488951983f6e0e506a24e8eabbe236f2e
font_01_sfnt_off000086b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B9 18352 bytes
SHA-256: 91a7490c887560cf1db9cb18ebb1e2a98db2d1ca6a1740dfb9f9cb38742cb9c1

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