PDF malware analysis — malicious · 3a2f9f1bc54a1195

MALICIOUS

PDF

33.3 KB Created: 2021-06-26 12:24:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18

MD5: bc1775a34964bd96fcba891cde236e82 SHA-1: ab08ec65fe2b2a3de0a88ad86537ad7e6523ae07 SHA-256: 3a2f9f1bc54a119511bb3229d6c1ca4855c49727aaf8f225b1b9e68e7a42d346

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 0.9980

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 http://netcdn.co/app/431946152/free-roblox-friends-game-hack PDF link annotation
- https://www.tw-storage.com.tw/upload/files/free-robux-stream_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/vip-area-for-free-in-roblox-texting-simulator_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-hack-that-actually-works_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/cheating-in-the-condo-roblox_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/hack-the-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-website_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/how-to-get-free-robux-on-roblox-2021-hack_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-characters-without-robux-2021_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
- https://www.tw-storage.com.tw/upload/files/coin-master-spin-free_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
`font_00_sfnt_off00002c24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2C24	22180 bytes
SHA-256: `37ef60b2f8e61da226528a840c9b75c370e0012d14361c1902fb49c01040a0fb`
`font_01_sfnt_off00005d69.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D69	18944 bytes
SHA-256: `7f046a72fb4476f620d1a3ff8d44fc915019e4ccbc90fc92ac51a3a2ab1721c3`

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