Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0622c7a9c4eed7d…

MALICIOUS

PDF

35.1 KB Created: 2021-06-20 06:02:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 93d4f5013c61f0c387f75b57a754fff2 SHA-1: ec7f407faa13995fe068379e3f634c979afecdef SHA-256: a0622c7a9c4eed7d2818913bda3bd080f0132a9f315a41462ff9fe68d6a6d0b3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to free game currency and hacks, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious. The embedded URL, http://netcdn.co/app/431946152/youtube-free-robux-hack-glitch-game-hack, is likely used to download and execute a second-stage payload.

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.co/app/431946152/youtube-free-robux-hack-glitch-game-hack PDF link annotation
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/roblox-icon-download-free_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/a-free-and-fast-way-of-getting-free-robux_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-to-hack-money-in-gas-station-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-robux-only_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-to-fly-hack-in-roblox-phantom-forces-2021_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/vide-hacking-for-roblox-robux_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-to-get-any-item-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.delhihomeoboard.in/uploaded_files/userfiles/files/how-to-get-free-robux-t_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
font_00_sfnt_off0000309c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309C 22500 bytes
SHA-256: 51f417ed2a70f0493cc75216121327cea164530c93adc51125052af8b01d009b
font_01_sfnt_off000062db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DB 19512 bytes
SHA-256: fe9b9448eb2b8569102f0ec75cce80365fea66d35c782237615d36c712076663

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