PDF malware analysis — malicious · 3ee81954d9973745

MALICIOUS

PDF

35.1 KB Created: 2021-07-09 07:09:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: ee999d4de76ff36260989c75b49ba387 SHA-1: d0960e59a1b36c22fe1af497bf02e85a73675201 SHA-256: 3ee81954d9973745f2a2670d1e20ba47c2f05afd28837ce612ebc0e79b04933c

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 http://netcdn.tw/app/406889139/free-spins-coin-master-2021-game-hack PDF link annotation
- https://www.vadai.sg/uploaded_files/userfiles/files/roblox-online-free_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/skidmax-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/pastebin-2021-robux-hack_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/t-shirt-template-roblox-free-shipping_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-earn-robux_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/20210-robux_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/hackear-roblox-con-robux-con-fiddelr4_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/google-how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/fan-page-coin-master_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/roblox-treasure-hunt-simulator-coin-hack_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-draw-1-roblox_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/game-give-free-robux_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/roblox-backpacking-hacks_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-online-roblox-robux-generator_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.

Filename	Kind	Source	Size
`stream_002_off00003168.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3168	23140 bytes
SHA-256: `c358f9404c2dee814658ec8481709cb31a50e036b59c135e416bbde9f60a002a`
`font_01_sfnt_off00006599.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6599	18576 bytes
SHA-256: `461056571ca453647e3c969961301e9f27cf934f5ba6ca99c4dfe7c56792b440`

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