PDF malware analysis — malicious · fbb3aef43d8cefe5

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 07:05:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 32ec3317e6c67ddf48fef8422568caa4 SHA-1: 8bd5a06714b6e474de9f6042a484a342a1daa9d5 SHA-256: fbb3aef43d8cefe5d6fb7df36304d4482d4760566c033afdf414d8ed6d8a535e

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/hack-coin-master-free-game-hack PDF link annotation
- http://www.raneenmed.com/uploaded_files/userfiles/files/roblox-comandos-para-free-admin-para-que-parezcas-un-virus_GM431946152.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/hack-forums-roblox-hacks_GM431946152.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-2021-april_GM431946152.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/roblox-jailbreak-get-free-money_GM431946152.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/pubg-uc-discount_GM1330123889.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/go-to-robux-free-gift-card_GM431946152.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/counter-blox-roblox-offensive-hacks-download_GM431946152.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/free-robux-auto-human-verification_GM431946152.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/play-minecraft-online-free_GM479516143.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/list-of-free-robux-sites_GM431946152.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/roblox-account-hacker-download-2021_GM431946152.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/free-shirt-roblox-boy_GM431946152.pdfIn PDF document text
- http://www.raneenmed.com/uploaded_files/userfiles/files/free-robux-youtube_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_off00003017.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3017	22568 bytes
SHA-256: `a5c26ae63118e8c886479c4bbd6691511471ed4030360365bd2c196844f2a1c0`
`font_01_sfnt_off00006251.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6251	18168 bytes
SHA-256: `be72a1914a99b846651b156c672e0768d1f742f579973333786d0ab12deac364`

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