PDF malware analysis — malicious · e31e4292f7f0a5d1

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 11:22:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: ee6d83527b0ec1154c1e0494f377adb0 SHA-1: b0b542a5f4a8926029dd0fc33dd1cf4a43059519 SHA-256: e31e4292f7f0a5d133b04686ae93e9344822b033ef8143601c36ad97bc3dafe3

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9980

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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 http://netcdn.tw/app/406889139/free-spin-coin-master-2021-link-game-hack PDF link annotation
- https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-play-online-free_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/robux-hacks-that-work-2021_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/play-free-roblox-com_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/free-games-at-roblox-com-htm_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/ex7-roblox-free_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/how-to-hack-get-money-in-roblox-tycoon-simulator_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/get-free-robux-gg_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/roblox-free-money-in-bloxburg_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/how-to-hack-roblox-mad-paintball_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-levels_GM406889139.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/roblox-hack-game_GM431946152.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
- https://balibanknews.com/new/public/ckfinder/userfiles/files/coin-master-hack-spins-android_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
`font_00_sfnt_off0000347d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x347D	22560 bytes
SHA-256: `15a2849edebe676967179e95d9ec2492e6f652222449da7bc4420004d16edb85`
`font_01_sfnt_off000066d9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66D9	18748 bytes
SHA-256: `87551c50e6d609f3c8aae9c53aca7d1ad4c281dc834da60ceb94801aa8be48ba`

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