PDF malware analysis — malicious · 12cbbdb21df9d961

MALICIOUS

PDF

34.6 KB Created: 2021-06-22 21:31:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: b5ebb3f824a27f741daf37f7acf48448 SHA-1: d40e6cde51c12bb3be8616b96c28bf1e5720a2b5 SHA-256: 12cbbdb21df9d961efebc6cb2eb875ee53ac6c8ae08e63d2772f2364435d679e

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.co/app/431946152/how-to-get-free-car-radio-in-roblox-game-hack PDF link annotation
- https://cosmosocean.com.tw/upload/files/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/haktuts-free-spins_GM406889139.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/roblox-hack_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/free-tiktok-accounts-with-followers_GM835599320.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/can-you-earn-robux_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/roblox-online-free_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/tiktok-free-auto-hearts_GM835599320.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/roblox-good-free-lvl6_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/roblox-dinosaur-simulator-how-to-get-megavore-for-free_GM431946152.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/coin-master-village-4_GM406889139.pdfIn PDF document text
- https://cosmosocean.com.tw/upload/files/free-spin-coin-master-2021-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
`font_00_sfnt_off00002fbf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FBF	22524 bytes
SHA-256: `c0f6d82083e22ac48621b85499f37acdf5dec78401c2cfd019a12925902f2172`
`font_01_sfnt_off000061db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x61DB	19212 bytes
SHA-256: `99a42f6f459d7ce692fde40e31dc233619accc6119f91af33480d1fcc8929d10`

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