PDF malware analysis — malicious · b90bc14d4b9d9863

MALICIOUS

PDF

43.5 KB Created: 2021-05-20 00:21:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24

MD5: 94f80e34076a0e1f244cf39bf02a3a50 SHA-1: cfa8b60e19a4fd6b4bd546fa6bebebb6059f1735 SHA-256: b90bc14d4b9d98631b910f0d33c22f5ce4da80cf5e2b5b8f06f4e1a0587c0bc2

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9969

Heuristics 4

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 https://netcdn.xyz/app/1330123889/pubg-uc-18-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-free-download_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/www-coin-master-hack_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/jailbreak-script_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-coin-master-spins-blog_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_003_off00004647.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4647	30816 bytes
SHA-256: `cf47e2536fcf87236dd03900ea7cf37c3811bb781f341dcfa93a9fdd1fdcc647`
`font_01_sfnt_off000087ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x87FF	18216 bytes
SHA-256: `3ba249d4db2240dc37e885e16fbfb195cb9f08758afdbaf0a4ce797a49bc81d1`

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