Malicious PDF — malware analysis report

Static analysis result for SHA-256 f26c4f540758e13b…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 18:23:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7fdc3b69628e508af105bc72fff9984b SHA-1: abde6a1446ce6338979cd4fdc14536087826ea90 SHA-256: f26c4f540758e13b7087069aec94b1c29b3a7b5676eca20c894f8d609af5dc7d
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-mod-apk-free-download-game-hack PDF link annotation
    • http://sellitafrica.com/media/storage/editor/files/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/pokemon-go-free-movement_GM1094591345.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/is-minecraft-vr-free_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-sell-an-item-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-hack-robux-on-roblox-download_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-robux-no-generator-and-no-verification_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-64-rom-hack_GM431946152.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_002_off00003244.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3244 23156 bytes
SHA-256: de0d5d4c5073f4a2650e3d89c6dca62fe8dcc28ac6d67c81f7eb8035bc4bcc99
font_01_sfnt_off00006626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6626 18924 bytes
SHA-256: 9c48e35ea9a5dc8e10dc41a2ce9881e75ec73337895d61689671ae319a04d3e6

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