PDF malware analysis — malicious · 7e50b9cf17bea5e1

MALICIOUS

PDF

32.0 KB Created: 2021-06-07 16:48:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: bf66802910c174c8572e2da220d2f1e0 SHA-1: 4266b21ad9147a704483e19a9daa76cec81b9ec2 SHA-256: 7e50b9cf17bea5e19d7fc7e72437b2ca49bdd582d172435868796970572a77d2

74 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 3

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.
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.tw/app/431946152/roblox-hack-with-winrar-game-hack PDF link annotation
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/minecraft-wurst_GM479516143.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-robux_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/roblox-its-free_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/free-tiktok-likes_GM835599320.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/robux-com-free_GM431946152.pdfIn PDF document text
- https://vosco.vn/uploads/vosco.vn/files/how-to-get-free-hair-on-roblox-on-phone_GM431946152.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005118.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5118	19534 bytes
SHA-256: `714d387c262c013f6a7658c3341991f7a136db76a9ef70d76314b6c75466df2c`

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