PDF malware analysis — malicious · a45698f272a9b989

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 12:43:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: cefcd62086cef6949d3aa2e14b2175b0 SHA-1: 632d4687f221335d97ebc73d2ef08809697bfd27 SHA-256: a45698f272a9b989eef4de0cce0f516483636021697a4426081d8a2fdddffa38

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/daily-free-spins-game-hack PDF link annotation
- https://www.jonaled.com/uploaded_files/userfiles/files/roblox-hack-999999-robux-cheat-engine_GM431946152.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/game-roblox-free-online_GM431946152.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-official-website_GM406889139.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/minecraft-packs-free_GM479516143.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/superhero-city-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/como-descargar-hacks-para-roblox_GM431946152.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/www-free-robux_GM431946152.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/free-robux-not-fake-app_GM431946152.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/what-is-the-best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/how-to-get-free-robux-with-the-nopde-cheat-engine_GM431946152.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/roblox-rc7-cracked-free-downlaod_GM431946152.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
- https://www.jonaled.com/uploaded_files/userfiles/files/minecraft-tower-defense-2-hacked_GM479516143.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_off00003108.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3108	22764 bytes
SHA-256: `82f1d16c7203ade9bdb6fca264f6cb4be455f65c7e6de9d75bfd1cdd91eaa2ac`
`font_01_sfnt_off0000644b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x644B	18348 bytes
SHA-256: `1a36946a0cb75cea73d2a4e26e89845c8e7c06408ba3f54c43b6c58b563cb802`

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