PDF malware analysis — malicious · 426d96aa5237657a

MALICIOUS

PDF

37.0 KB Created: 2021-07-16 05:57:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 87d9a177bce7575bf30ac0c6374fa950 SHA-1: f4674ab4c8f267c7de471b732954bcbee145b23e SHA-256: 426d96aa5237657af4d76ac91caf2eb2a04edff6433f1c03da5d76836b214f03

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document employs a lure related to free game currency and hacks, as indicated by the document body and heuristic firings. It contains an embedded URI pointing to 'http://netcdn.tw/app/431946152/how-do-you-get-free-robux-without-paying-game-hack', which is likely a redirector to a malicious site or a phishing page. The ML classifier also strongly flagged this PDF as malicious.

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.tw/app/431946152/how-do-you-get-free-robux-without-paying-game-hack PDF link annotation
- https://www.astrospace.com.tw/upload/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/can-you-give-me-robux_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/roblox-hackrar-2021_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/cheat-roblox-free_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/info-roblox-com-robux_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/how-to-hack-roblox-jailbreak-easy_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/robux-hack-and-bc-2021_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-apk_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/roblox-hack-top-2021_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_off00003648.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3648	22568 bytes
SHA-256: `cacc9a8a851605d8d3ac14d7e2689ef095e04d0e25985846c3bb09b230f4ab0c`
`font_01_sfnt_off00006873.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6873	20132 bytes
SHA-256: `c07b0b11f78d0b32743d2374f7ceb2c85cbae78592b8eec29f5c2a650ddaa995`

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