PDF malware analysis — malicious · f8b7c78f954b1029

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 17:13:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24

MD5: 4c89bf9d8fee7f682cf35562c1e40a0f SHA-1: 52d95f028b20a46088454f6233907d54f28f8f4f SHA-256: f8b7c78f954b1029388bbf654b83ff5b647dae29503bc22b8ed78300a1ed45c0

220 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, specifically targeting users with lures related to game hacks and generators. The document body, though heavily obfuscated, contains URLs that align with these findings. The primary malicious URL identified is https://netcdn.online/app/406889139/hack-coin-master-online-without-human-verification-game-hack, which is linked to known malicious redirector infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/406889139/hack-coin-master-online-without-human-verification-game-hack In PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/cpbildco-robux_GM431946152.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/roblox-premium-free_GM431946152.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/www-roblox-com-robux_GM431946152.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
- https://kejari-denpasar.go.id/public/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.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
`stream_004_off00005590.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5590	27496 bytes
SHA-256: `95d124501be7381442aa99d7a39967a43812e804a6d959ed8755da93a983ac07`
`font_01_sfnt_off00009440.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9440	18688 bytes
SHA-256: `aff6012002d7c8d1238c8ca496166b12a8d25d6fb5282892c0f4493fdd227159`

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