PDF malware analysis — malicious · c3eb9256f2620948

MALICIOUS

PDF

51.9 KB Created: 2021-06-09 06:08:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 8dac1d8af06a15e21a2ffb0c6588dcb0 SHA-1: 107d9761d6c8b83737ba68bfdc88dd811aee419d SHA-256: c3eb9256f2620948d3b1f1935a7edf4d8e55381681f3c7c3f720fdfc76337052

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 0.9464

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.tw/app/431946152/how-to-open-proxo-roblox-hack-game-hack PDF link annotation
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-roblox-hide-and-seek-extreme_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/minecraft-free-reddit_GM479516143.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-robux-discord_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-email-rewards_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-ios-gods-hack_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_off0000511a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x511A	30912 bytes
SHA-256: `88a9d6d433999d46dfb6a6c3089d178f53ee6e32de80c35ad0bda79d09fe5b27`
`font_01_sfnt_off000099f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x99F1	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_02_sfnt_off0000a703.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA703	18676 bytes
SHA-256: `0fec1e5f4a6839dcce50491d21f0aecea455c0b98412889217adc75616cbf7d5`

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