Malicious PDF — malware analysis report

Static analysis result for SHA-256 31a08e18000a2248…

MALICIOUS

PDF

43.4 KB Created: 2021-05-14 20:41:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 960417acb194230a75bd6a02d2e72846 SHA-1: 1a7420361be11bb0c59601d58eed7f65f36e9f12 SHA-256: 31a08e18000a224854b1200ea60a99727b495a75355f1306443d34eb1cb8136e
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/406889139/coin-master-today-game-hack PDF link annotation
    • http://sellitafrica.com/media/storage/editor/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/robux-match_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005001.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5001 24524 bytes
SHA-256: ddfa1121d195f9a474eae3e9d7ed8d1c500f8c853ada9b5c286da1a4d2321fc8
font_01_sfnt_off0000884b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x884B 17900 bytes
SHA-256: 4d8f4d30bf6ed32ab69c0e3c6b9d13f3aedccf41ef86a94604d61125f9e6c526

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