PDF malware analysis — malicious · 3cd5ce0cef6daf15

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 05:35:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: 93926be7e4a8487e091f411d92f79833 SHA-1: 7c53055961df723d25f0b9d722b6bc1328b5acac SHA-256: 3cd5ce0cef6daf15b3787baedae0e0041d74d0c2c5bdc3a8b8ca44575617f064

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game items and currency to entice users. It contains multiple embedded links, with the primary one redirecting to a malicious URL associated with game hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9864

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/free-robux-events-game-hack PDF link annotation
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/minecraft-items_GM479516143.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/robux-page-free_GM431946152.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/pubg-uc-new-redeem-code_GM1330123889.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-card-link-coin-master_GM406889139.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/roblox-18_GM431946152.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-free-cards_GM406889139.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_off0000516f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x516F	27568 bytes
SHA-256: `1374ef1ec4ef7ad9c7b995f7248dae4519f91ce71595e5caea274b6279fedc5e`
`font_01_sfnt_off00008fcc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8FCC	18232 bytes
SHA-256: `ab6bfd96968a86e230e5379b433a098ab75a0275d7cac23e71c92d11c0397df9`

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