PDF malware analysis — malicious · 318c8ce4118967a1

MALICIOUS

PDF

36.1 KB Created: 2021-07-09 15:17:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 143177ccbb4b5986642cbbe75c31dd16 SHA-1: 184fa56f4542fbbd0e9f82b31e7a4c200e678023 SHA-256: 318c8ce4118967a1fc87d0b08d38e345bb99c7a215df1c5979902bcb771ca108

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a 'game hack' and directs users to a suspicious URL. The ML classifier also flagged this PDF as malicious. The primary IOC is the external URI pointing to a likely malicious redirector.

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/431946152/roblox-com-hack-game-hack PDF link annotation
- https://www.eisgroupme.com/uploaded_files/userfiles/files/coin-master-apk-hack_GM406889139.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/robux-miner_GM431946152.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/roblox-louie-vuitton-free_GM431946152.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/free-robux-np-verification_GM431946152.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/lohith-gaming-free-robux_GM431946152.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/how-to-get-free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/minecraft-116-free_GM479516143.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/how-to-cheat-on-ramboredkill-in-roblox-2021-youtube_GM431946152.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/roblox-bubblegum-simulator-cheats-2021_GM431946152.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
- https://www.eisgroupme.com/uploaded_files/userfiles/files/roblox-party-printables-free_GM431946152.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_off0000338e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x338E	23408 bytes
SHA-256: `fd94cf1cc303f711f34d86ecebdc8ef64a510bd8f1ed26df6d280163c4cb1485`
`font_01_sfnt_off00006898.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6898	18916 bytes
SHA-256: `9cb05533f98f4e2367072af5f88feb3ab929c06b5a26e3a671612f35ad90b071`

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