PDF malware analysis — malicious · 8dd240273d29d5a7

MALICIOUS

PDF

49.0 KB Created: 2021-05-14 00:01:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: f14fbe9167adb7cc41ebb76bae516f5b SHA-1: 12549ba97a4d41a69ba624583044313e7366426f SHA-256: 8dd240273d29d5a78c9a58fe6d08d058410831ef8a20ef85c64d400fde7f4f7e

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 0.9228

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.xyz/app/431946152/roblox-free-robux-no-human-verification-game-hack PDF link annotation
- http://www.elsire.co.in/uploaded_files/userfiles/files/roblox-old-avatar_GM431946152.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/free-roblox-card_GM431946152.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/free-robux-gen_GM431946152.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/coin-master-game-download-free_GM406889139.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/robux-redeem_GM431946152.pdfIn PDF document text
- http://www.elsire.co.in/uploaded_files/userfiles/files/free-minecraft-skins-ps4_GM479516143.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_003_off00004f36.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4F36	28604 bytes
SHA-256: `b28ae87e0d24ede2cb88337fed36aca754596a138f742e4519db3ab8e419b7aa`
`font_01_sfnt_off000091ae.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x91AE	2844 bytes
SHA-256: `a66b570a908761b39e6d9e18bcb667c353840a86c6a7db528f79d01abe6b23a1`
`font_02_sfnt_off00009b55.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9B55	18932 bytes
SHA-256: `9d302b82f438100f3cf39adb1b208b926e457e77310e02e89ba7e0c774768e38`

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