Malicious PDF — malware analysis report

Static analysis result for SHA-256 51fd8f27287a0eb2…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 16:08:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: dec0a42f8282e1d6b7247390e749a20c SHA-1: f05025d253a2f4fc9c68714b299400f63e49f31d SHA-256: 51fd8f27287a0eb230f5aad64aa1f281f5f61525ae70816097a654427674d1ab
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 0.9864

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.online/app/479516143/minecraft-bedrock-free-game-hack PDF link annotation
    • https://www.jcn.co.uk/uploads/files/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-hack-cunter-blox_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/com-roblox_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/roblox-land-free-robux_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_004_off000053e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53E3 26280 bytes
SHA-256: ad1795bdf6dfbee7b0c12c56c6e53485733c57edc759fb45eaa78fbc1f966270
font_01_sfnt_off00009016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9016 18268 bytes
SHA-256: 421dc37018d5e6f1467ffbccbacebf5894202cb157ac672e86022266516fa266

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