PDF malware analysis — malicious · 8ae8fd45e26f8213

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 16:29:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23

MD5: 9e9c297e550235e76e884241ddea7cfe SHA-1: e7336471bb6fc63afff075f2b756e0696ba4c492 SHA-256: 8ae8fd45e26f82138c1ddef80ec83d1f557ee16d218902e735dc71d69746a793

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9865

Heuristics 5

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/835599320/tiktok-viewer-free-game-hack PDF link annotation
- https://www.andrology.co.uk/uploads/files/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-roblox-accounts_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-master_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/pokemon-go-free_GM1094591345.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-com-real_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/how-to-free-robux_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-robux-real_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-roblox-dominus_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.andrology.co.uk/uploads/files/files/free-coins-coin-master-link-today_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_004_off00004ee5.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4EE5	24508 bytes
SHA-256: `e9add986c4ed866881e371431982dca6a1017310026f6410f82f76747f41649f`
`font_01_sfnt_off00008767.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8767	17752 bytes
SHA-256: `03cae80738042903ed7303e5923c2b1ca7393d04b72c6adefe1e53c55c9a8aab`

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