PDF malware analysis — malicious · 72121f8b63faf8eb

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 03:28:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 28aec1994ca3b12786df3b1a0af0a793 SHA-1: d5b153eb54d310072acb86dbd34118e972d834be SHA-256: 72121f8b63faf8eb4e2626ee63236630aa5aa3f1fa0fb6b3b1497ea81700d93c

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a lure for 'free TikTok fans' and game hacks, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. The document body and heuristics suggest the primary goal is to redirect users to external sites, likely for further exploitation or to collect credentials.

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/835599320/free-tiktok-fans-no-human-verification-or-downloading-apps-game-hack PDF link annotation
- https://www.sarsen.net/uploads/files/files/pokemon-go-free-gps-hack_GM1094591345.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/download-apps-for-robux_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/roblox-free-t-shirt-nike_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-roblox-money_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/roblox-free-download-latest-version_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/roblox-premium-free_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-robux-promo-codes-2021-not-used-june_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/robux-today_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-roblox-adopt-me-codes_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
- https://www.sarsen.net/uploads/files/files/roblox-hack-robux-cheat-engine-64_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
`font_00_sfnt_off00003394.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3394	22376 bytes
SHA-256: `7fdaf291ebdded87036f47282bb062bfbe974a4416cfd067ae15b994932c06b7`
`font_01_sfnt_off00006544.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6544	19260 bytes
SHA-256: `c23abd5df90a5b7093cc3e198b5bcaea5ee7ff11a274e14c679da15d1a345c21`

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