PDF malware analysis — malicious · 4da50e7960c53c28

MALICIOUS

PDF

49.7 KB Created: 2021-06-09 05:09:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: efcd6d69aa375537e923e131e3dc393b SHA-1: 0cd83dacd3f325d6bdff5c5a568d3c5c96935308 SHA-256: 4da50e7960c53c28cf691d4a4ff97769b3b78bc4c334b44ecfdf46bf5b880bf2

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 0.9796

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 https://netcdn.tw/app/431946152/roblox-adopt-me-free-vbucks-game-hack PDF link annotation
- https://elearningman2jember.com/__statics/gudangsoal/files/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
- https://elearningman2jember.com/__statics/gudangsoal/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
- https://elearningman2jember.com/__statics/gudangsoal/files/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
- http://elearningman2jember.com/__statics/gudangsoal/files/tiradas-coin-master_GM406889139.pdfIn PDF document text
- https://elearningman2jember.com/__statics/gudangsoal/files/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
- http://elearningman2jember.com/__statics/gudangsoal/files/roblox-script-executor-free-dd_GM431946152.pdfIn PDF document text
- http://elearningman2jember.com/__statics/gudangsoal/files/coin-master-email-rewards_GM406889139.pdfIn PDF document text
- https://elearningman2jember.com/__statics/gudangsoal/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
- http://elearningman2jember.com/__statics/gudangsoal/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
- https://elearningman2jember.com/__statics/gudangsoal/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
- http://elearningman2jember.com/__statics/gudangsoal/files/coin-master-spins_GM406889139.pdfIn PDF document text
- http://elearningman2jember.com/__statics/gudangsoal/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
- https://elearningman2jember.com/__statics/gudangsoal/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- http://elearningman2jember.com/__statics/gudangsoal/files/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
- http://elearningman2jember.com/__statics/gudangsoal/files/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
- http://elearningman2jember.com/__statics/gudangsoal/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
- http://elearningman2jember.com/__statics/gudangsoal/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
- https://elearningman2jember.com/__statics/gudangsoal/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
- http://elearningman2jember.com/__statics/gudangsoal/files/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
- http://elearningman2jember.com/__statics/gudangsoal/files/hack-coin-master-without-verification_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
`font_00_sfnt_off00005249.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5249	28768 bytes
SHA-256: `07a7ea5d6bdb9891ad26edd1269e67549c2e7f32a26b66506d175eeb22456044`
`font_01_sfnt_off0000938e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x938E	2824 bytes
SHA-256: `94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4`
`font_02_sfnt_off00009d3d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9D3D	19044 bytes
SHA-256: `5703ed85774cd6fcdabd534dd8cffd149988d41d248ba78284548f023be3cca1`

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