Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d928136a8230820…

MALICIOUS

PDF

43.6 KB Created: 2021-05-16 20:41:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bcec80ca68861117a28bd006415ea6a4 SHA-1: 041bcce2e6cf106ec9d4ea8ef6522b5dddee1d8d SHA-256: 9d928136a8230820d26e85fc2ca50504e09ba0fa9cba0b24c4d11b26ac6891d9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of 'free game hacks' and 'promo codes' to entice users. It contains multiple embedded URLs that redirect to external sites, likely serving as a gateway for further malicious activity such as phishing or malware delivery. The ML classifier strongly indicated maliciousness, supporting the analysis of the document's deceptive content.

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/431946152/free-robux-promo-codes-2021-game-hack PDF link annotation
    • 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/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-rules_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/i-robux_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_003_off00004c63.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C63 25472 bytes
SHA-256: 8a43f69c59dcf0eb0e62566b46d409cc240e25cb54bfffcd2a16a8a52fdd6a98
font_01_sfnt_off000085fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85FD 19004 bytes
SHA-256: 2ae4233163b81a205a597c97f5f9bceef85a21038461a0399da8d1b6d9f39b0a

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