PDF malware analysis — malicious · 999c5309f6af0f49

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 14:32:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 199aa6eccd7116aefafc3d5a49268f91 SHA-1: e2e6036087b4923d73da027f4f2bb7b49f52f13a SHA-256: 999c5309f6af0f4966fa346ff29f5572ff85548c196fa3ad26c8ec0025f2fdd2

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/http-coin-master-hack-club-game-hack PDF link annotation
- http://www.valenciamaids.com/userfiles/files/how-to-robux_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/minecraft-menu_GM479516143.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-admin-roblox_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/hacks-for-roblox-royal-high_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/how-to-get-free-robux-2021-may_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/wurst-115-2_GM479516143.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/pastebin-roblox-robux-hack_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/roblox-free-group-finder_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/rbx-earn_GM431946152.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
- http://www.valenciamaids.com/userfiles/files/coin-master-link_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_002_off00003074.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3074	22960 bytes
SHA-256: `f63c5f5c43310f85fd9fef340d41154fe7aaebf7d84e0eed870a3093f364443e`
`font_01_sfnt_off00006405.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6405	18552 bytes
SHA-256: `2b692b97aab47b99e51e6e735d9ab4970cab65cf41d6985ffd493ef48a87bc91`

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