PDF malware analysis — malicious · 12bb6530ab1327e1

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 04:51:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 536b73156c6779e4617b3b92fba4e2ba SHA-1: d0c02babd909034de70de0e17aeec5ad219257ce SHA-256: 12bb6530ab1327e1a813d1ab14e9d77c9deeb85b67903c96ab2f7ea840c03adf

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/431946152/how-to-hack-roblox-2021-game-hack PDF link annotation
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/roblox-register-free_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/roblox-hack-password-free-download_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-clothing-on-roblox-names-for-girls_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-hack-coins_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/make-your-own-roblox-character-for-free_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/blox-best-robux_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/can-i-have-free-robux-generator_GM431946152.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.esmartdigitalcard.com/uploaded_files/userfiles/files/tower-of-hell-roblox-hack_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_off00002f35.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F35	21724 bytes
SHA-256: `5350d61c197464c0b25fc471f66f0572fb7f1751f4f24c7ee47d89dc24e4a617`
`font_01_sfnt_off00005ef7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5EF7	19224 bytes
SHA-256: `952aa56c448a3876108b271681fe1a59f9d49131b8b4cd095e69c290d9073af5`

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