PDF malware analysis — malicious · 4a782f22b6278062

MALICIOUS

PDF

35.5 KB Created: 2021-07-03 21:05:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 6af747f08cecc8f6b02e18c1ce1bab6a SHA-1: 52d0d99e8e867cc570b648eb1f9188f753b0f225 SHA-256: 4a782f22b627806206991996695e259bdf2240629c16d95048f9be478f693208

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains numerous links, including a critical redirector link to 'http://netcdn.tw/app/406889139/coin-master-free-gift-cards-game-hack', which is flagged as malicious. The document body and heuristics indicate a lure for game hacks and free items, suggesting a phishing or scam attempt. The presence of many external links points towards a link farm designed to distribute malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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.
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
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/coin-master-free-gift-cards-game-hack In PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/roblox-hack-como-tener-robux-gratis-2021-nuevo-truco_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-one-mill-in-roblox_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/does-roblox-work-with-cheat-engine_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/roblox-craftwars-hack_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-do-you-get-robux-for-free-roblox-youtube_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/escape-school-oby-roblox-cheats_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-games-roblox_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/is-roblox-free-on-nintendo-switch_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
- http://kpu-klungkungkab.go.id/new/public/ckfinder/userfiles/files/zyrus-12-roblox-hack-exploit_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_off0000362d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x362D	22556 bytes
SHA-256: `8292cc44d4849ab0f8e43c49be2bf3f6391cc14e2aee66c2cced246d83a51952`
`font_01_sfnt_off00006873.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6873	18172 bytes
SHA-256: `f2f666f8efae858ca18be3d98771932124107df95f881e4d85f8b2df0a7d2408`

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