PDF malware analysis — malicious · e6dfbaeb520b67fc

MALICIOUS

PDF

47.9 KB Created: 2021-05-14 10:32:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 4aa1a6b8119b638422e1966531f1e68b SHA-1: 08aa7907a7779b6e64bd477d066dcad62d6b3c38 SHA-256: e6dfbaeb520b67fc5362f386e80fa660a1c2aa7796674615c500f6f18224c10c

182 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is designed as a lure, presenting a fake CAPTCHA and download buttons to trick users into clicking links for game hacks and free currency. The document contains a large number of external links, many pointing to PDF files hosted on failtesolar.com, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-generator-no-human-verification-2021-game-hack.

Machine Learning

Nyx PDF Classifier malicious score 0.9013

Heuristics 6

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.
Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA

Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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/free-robux-generator-no-human-verification-2021-game-hack PDF link annotation
- https://www.failtesolar.com/uploaded_files/userfiles/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-hack-here_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/wurst-client-download_GM479516143.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-fan-hack_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.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_off00004b6a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B6A	26228 bytes
SHA-256: `84f17eef5205d00291f7c4abedd46206b08c1713583cdf21b1f86f870fc41a79`
`font_01_sfnt_off000088cc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x88CC	5696 bytes
SHA-256: `450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139`
`font_02_sfnt_off000095de.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x95DE	19260 bytes
SHA-256: `cfeb00e99c7da41c79bd6814c2de1bf58f441159bdfe452787b9448ffd27beb4`

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