PDF malware analysis — malicious · a3d27e1da3175542

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 09:23:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 79cfde62ff47e0f585e62770400a660b SHA-1: aaf35a883be3a87adce215fda32327ff4a43723e SHA-256: a3d27e1da317554204825bc4c14d5bf7546d61e0ced7a36b0f140e8fb71886b8

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 0.9865

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/406889139/hack-version-coin-master-apk-game-hack PDF link annotation
- https://marstechmedical.com/uploaded_files/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/minecraft-free-app_GM479516143.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/pokemon-go-free-friends_GM1094591345.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/free-tiktok-invitation-template_GM835599320.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
- https://marstechmedical.com/uploaded_files/userfiles/files/blox-land-free-robux_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_004_off000051c4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51C4	24136 bytes
SHA-256: `7e422edaf84a50b7a2c049fc22b3b1e529708e797cc03b96b1b9727fffbc81e4`
`font_01_sfnt_off000088db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88DB	18028 bytes
SHA-256: `3f168c1f6698dcf2dd7090d469e87ca8ddd6c2d99ef7bd4e7b306b99a7cfc93f`

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