PDF malware analysis — malicious · 19bbaa3cf9e65d2b

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 16:11:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: a381df2db170f8c02a80fef184b63101 SHA-1: 705d46bc0f9f08a80bd40ec5b07891842c59ab6d SHA-256: 19bbaa3cf9e65d2bec6772faff9c3bbbc4d1a625600485efd377309dcb1bc3ab

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 0.9865

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.online/app/431946152/roblox-promo-codes-2021-robux-game-hack PDF link annotation
- https://www.jcn.co.uk/uploads/files/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-coin-master-generator_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coinmaster-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-scam_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-private-server-roblox_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/robux-for-free-2021-no-vertification_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/wurst-client-download_GM479516143.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_off00005041.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5041	24092 bytes
SHA-256: `9102b67638cb85ef7e56e988ceb9e4f2fcd9146c91dabdae83319c8123b7f6d2`
`font_01_sfnt_off0000873b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x873B	18912 bytes
SHA-256: `78e5a4f925f7a7099a01314b73c68b79f9c6154f744724e21f80ba84a8cb6293`

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