PDF malware analysis — malicious · dcffa92cf5a37c01

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 08:40:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: c230cc4ba1ac933263b49170ba4e754f SHA-1: b1381ef1e44fc9c619c2624959f4f5d218fce11e SHA-256: dcffa92cf5a37c0148015c995f6506db3d2ba601afa532659650a796a3a7c4c5

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 0.9864

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.online/app/431946152/free-robux-games-on-roblox-game-hack PDF link annotation
- https://loba.com.vn/public/upload/files/install-free-game-coin-master_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/hacks-minecraft_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/roblox-redeem-card-codes-free_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/wurst-18-9_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/free-robux-survey_GM431946152.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-hacks_GM406889139.pdfIn PDF document text
- https://loba.com.vn/public/upload/files/coin-master-free-soins_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_off000051eb.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51EB	26500 bytes
SHA-256: `5fd54d4c5f953d54bacd226cad99b0db7995c96a11f6c8774b854df2cf721d99`
`font_01_sfnt_off00008ea1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EA1	18576 bytes
SHA-256: `121d272924a8948b6bfdf19867642727f57edf659587de43eb46571e5003926c`

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