PDF malware analysis — malicious · b40d7164844e9674

MALICIOUS

PDF

44.6 KB Created: 2021-05-16 13:26:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02

MD5: 522a515d8a364e5ce04eaa8d6409cc2e SHA-1: c4b479f7844c1d5389faac1f8d224f94decab53c SHA-256: b40d7164844e9674765e93c44bd72f6fed59a093752c082cb51ca7c269847376

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 https://netcdn.xyz/app/431946152/more-robux-game-hack PDF link annotation
- https://www.orbai.ai/uploaded_files/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/robux-adder_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/robuxy-com-generator_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-just-click_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/free-robux-obby_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/microsoft-roblox_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/minecraft-hack-2021_GM479516143.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
- https://www.orbai.ai/uploaded_files/userfiles/files/coin-master-games-hack_GM406889139.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.

Filename	Kind	Source	Size
`stream_003_off00004bc7.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BC7	28940 bytes
SHA-256: `3e238b03d7ba7cfc9fb434b9c6767776061909a45bab2278490a1f38be86583c`
`font_01_sfnt_off00008cd9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CD9	18044 bytes
SHA-256: `2cdd30725ec16b560af68fa44fbb44b377c0aea3ee608aeb4cb73b855c777d19`

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