PDF malware analysis — malicious · 6e333967d53d54eb

MALICIOUS

PDF

41.1 KB Created: 2021-05-18 02:10:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 3f641691161454d76a0bcc5e22fdf52c SHA-1: 96ec91b8a266bbb2df78ec6854e61f74abe94700 SHA-256: 6e333967d53d54eb21fbbc610593cf6dacfae3e3f477b35a20d4142dfcd13a07

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 0.9971

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.xyz/app/406889139/coin-master-free-coins-link-2021-game-hack PDF link annotation
- http://dobrovodie.ru/images/coin-master-apk-free-download_GM406889139.pdfIn PDF document text
- http://dobrovodie.ru/images/free-robux-co_GM431946152.pdfIn PDF document text
- http://dobrovodie.ru/images/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
- http://dobrovodie.ru/images/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
- http://dobrovodie.ru/images/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
- http://dobrovodie.ru/images/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
- http://dobrovodie.ru/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
- http://dobrovodie.ru/images/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
- http://dobrovodie.ru/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
- http://dobrovodie.ru/images/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
- http://dobrovodie.ru/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
- http://dobrovodie.ru/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://dobrovodie.ru/images/coin-master-village-cost_GM406889139.pdfIn PDF document text
- http://dobrovodie.ru/images/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
- http://dobrovodie.ru/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
- http://dobrovodie.ru/images/free-robux-for-kids_GM431946152.pdfIn PDF document text
- http://dobrovodie.ru/images/wurst-112-2_GM479516143.pdfIn PDF document text
- http://dobrovodie.ru/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
- http://dobrovodie.ru/images/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
- http://dobrovodie.ru/images/roblox-adopt-me-free-pets_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
`font_00_sfnt_off00004710.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4710	24008 bytes
SHA-256: `9e166be9fa5b3f1841c93155762659cec7d341a74b99e17ed1650f2f9fd486be`
`font_01_sfnt_off00007df0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DF0	18284 bytes
SHA-256: `be459003f2db1a934c49859962f2962ce704e042ee0985c73311b64c11e09449`

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