PDF malware analysis — malicious · 8b3733f2e6b08003

MALICIOUS

PDF

60.3 KB Created: 2021-06-03 05:56:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: d175e579215393a307a203f31dee9262 SHA-1: 4dea5d2e11a342ef2781fe123a2faf26486bf27d SHA-256: 8b3733f2e6b08003dae2b1cc49a1e01cc82ea0ec7ad6f6643982e976dcdae282

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 0.9611

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 https://netcdn.online/app/431946152/how-to-run-fast-in-roblox-hack-game-hack PDF link annotation
- https://www.legclub.org/uploads/files/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/actual-free-robux_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/tiktok-famous-club-free-followers_GM835599320.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/roblox-but_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/tiktok-for-free_GM835599320.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/tiktok-free-64-bit_GM835599320.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/free-robux-exe_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/pokemon-go-free-roam-hack_GM1094591345.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/roblox-hack-site_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.legclub.org/uploads/files/files/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000055be.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x55BE	40800 bytes
SHA-256: `ce016e8035f89a825178719da8b6c1250c8de9d3be9ee4fa9f1f78c5afc9ada7`
`font_01_sfnt_off0000af56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAF56	3512 bytes
SHA-256: `d2fbe445e4228ea2e3d75d3e8f0f84124f9dd8d3d0cf2c6e4e63bcca92f2519f`
`font_02_sfnt_off0000bae5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBAE5	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_03_sfnt_off0000c7f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7F7	18756 bytes
SHA-256: `c338d1ef88b07be543857628573befd7ca2dd8da9a64b4c28f4a67a4da0a8692`

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