PDF malware analysis — malicious · ee1e16ee319ab3fb

MALICIOUS

PDF

37.0 KB Created: 2021-07-04 02:19:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: 19fb5eafc303a42d84a0839c8bd21064 SHA-1: aa45ddd655659ac09b16f3ad381fd60454288f9b SHA-256: ee1e16ee319ab3fb6e100dab9af07157d27c5a324d36c1cd335cd35d2d9858da

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/free-robux-generator-no-human-verification-game-hack PDF link annotation
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/how-to-hack-on-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/free-robux-generator-no-download-no-verification-2021_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/roblox-for-free-no-sign-in_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/aimbot-hack-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/roblox-dominus-free_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/5-games-that-give-free-robux_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/como-tener-robux-con-cheat-engine-2021_GM431946152.pdfIn PDF document text
- https://www.waymedicalsupplies.com/uploaded_files/userfiles/files/earn-roblox-online-free_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_off0000356c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x356C	24080 bytes
SHA-256: `28c35e708b2495bb1edb048fcdb8e70b1e4685d5f2cd6d0953933eef47a1e756`
`font_01_sfnt_off00006b0d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6B0D	19336 bytes
SHA-256: `1e7a5ee1c2d4ea33325644fd63b1f7e257f54daacec13fb4b037f0c912b7aa4c`

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