PDF malware analysis — malicious · 18b5da52a2f45d87

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 09:59:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 571fc7f8f74c66727a4ec3523b9eb7db SHA-1: 8503b57022eff1f2e9a2d78b47d1f1b86311ebeb SHA-256: 18b5da52a2f45d87222e2330dc0275579e286a574e664bf13918ffbefc2ab887

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to 'netcdn.tw', which is flagged as a redirector for game hacks. The document body and heuristics indicate a lure for free game currency or hacks, likely to redirect users to malicious sites. No scripts were extracted, but the presence of embedded URLs and the 'game hack redirect lure' heuristic strongly suggest a phishing or malware distribution attempt.

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-appsfor-coin-master-daily-rewards-game-hack PDF link annotation
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/freed-roblox_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-filter-anti-cheat_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-robux-no-hack-2021_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-robux-and-obc-generator_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/hacker-forums-for-roblox_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/games-roblox-hack_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/dragon-ball-z-roblox-training-hack_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/how-to-get-5-robux-for-free-2021_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/comment-avoir-des-robux-gratuit-avec-hack_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-robux-codes-october-2021_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-hacks-veiculos-simulator_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/if-you-get-hacked-on-roblox-what-do-you-do_GM431946152.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
- http://www.ventureit.com.sg/uploaded_files/userfiles/files/roblox-girl-shirt-codes-free-shipping_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
`font_00_sfnt_off000030ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x30AB	22660 bytes
SHA-256: `b63b5fbf7250477d13678faf6469d1c430c387cb0883db33b9d3cf2fc4c62afc`
`font_01_sfnt_off00006381.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6381	18932 bytes
SHA-256: `23f2122d1e025a40a200fe5bf9e157b0cd475f9e07a39137d42bc2e355502eb2`

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