Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50cf07070aa5f67…

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 02:32:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 66492134de4dda816f9e1672d5fd3c79 SHA-1: 2b5a34770779060116fd49c8a992e8eac6ae3aaf SHA-256: a50cf07070aa5f67a6dabe512c0a225cc09b8540bc5f93ca538eec23b8861b6b
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/robux-xyz-game-hack PDF link annotation
    • https://susantomeubel.com/ckfinder/userfiles/files/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://susantomeubel.com/ckfinder/userfiles/files/haktuts-coin-master-free-spins_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_003_off00004979.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4979 24996 bytes
SHA-256: fba050b2789943c2d787f5b0b0cb50c57849e4b04dcd5e0d7e426482247f04a4
font_01_sfnt_off0000828c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828C 18112 bytes
SHA-256: ca7f5f9618641a98a9c19d491d3cdfb459cfe3a3cc083d97c385a6405de8606e

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