PDF malware analysis — malicious · c945a93970f23dc9

MALICIOUS

PDF

32.5 KB Created: 2021-06-17 19:37:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: b00d79414afc0a15c2ab723ad2f4bdc6 SHA-1: 0f14fb457dc3f4fb438818971e8b3d79035e3991 SHA-256: c945a93970f23dc9789fe36c0e37d165b8e1edac8de3a69dda8e4111729fa09f

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 0.9824

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.co/app/431946152/roblox-hack-dark-devs-one-piece-game-hack PDF link annotation
- https://www.tiancom.com.tw/upload/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/apk-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/roblox-hack_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/robux-com-free_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/minecraft-mobile-free_GM479516143.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
- https://www.tiancom.com.tw/upload/files/robux-gift-card-free_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_off00002a9a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2A9A	21684 bytes
SHA-256: `42594e79caa201e7bf3aecdbe79356a0863a71a3f9b1d914dae34734937ce7fc`
`font_01_sfnt_off00005a44.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5A44	19024 bytes
SHA-256: `38407b4e014f90282292419164f959b75955bfc93530d6195f870f0e10745712`

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