PDF malware analysis — malicious · a179df17f74becb1

MALICIOUS

PDF

46.7 KB Created: 2021-06-03 21:56:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: a1e8d59251311b6bec6723c6ec9abdbb SHA-1: 235e41ebe4c6c22480755cc4136398e2e7767fcd SHA-256: a179df17f74becb17f264460d5f8d68241e70dadcc22a0115f2ea2ce50756f82

142 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. It uses a seed-phrase/secret-recovery lure. 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 0.9748

Heuristics 5

Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE

Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
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/406889139/coin-master-hack-spin-generator-tool-game-hack PDF link annotation
- https://www.bridalguide.com/sites/default/files/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/freespinandcoin_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-robux-2021_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/free-2021-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/how-to-free-robux_GM431946152.pdfIn PDF document text
- https://www.bridalguide.com/sites/default/files/files/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00005198.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5198	25240 bytes
SHA-256: `1e198031128dd353330b862af820635ea70ad97d0b73cc45c2447eefd2f1b71b`
`font_01_sfnt_off00008ad6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8AD6	2868 bytes
SHA-256: `d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855`
`font_02_sfnt_off000094c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x94C1	17968 bytes
SHA-256: `ea67d54f04c33a937dae932ca1fc44fc221a1b4b4b4a53e5a275faf6159c5a59`

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