PDF malware analysis — malicious · 977dc134771b9c79

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 02:24:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05

MD5: ea0a80a22ade17927c1cd174c5f1d1da SHA-1: dac2506b5688f849dc68bbc0f047e22b730f935d SHA-256: 977dc134771b9c795f71c6dc1ed9b1bfddc7eeaa5886656b4fc69f99a147db4e

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a lure related to free game items, specifically for Roblox, and links to a URL that is likely malicious. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a download button lure further support this assessment. The document's content and embedded links suggest an attempt to redirect users to a site that may host further malware or engage in phishing.

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/free-vip-roblox-game-hack PDF link annotation
- http://www.arichuna.com/images/files/denisdaily-skin-roblox-free_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/robux-scam_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/pubg-uc-free-generator_GM1330123889.pdfIn PDF document text
- http://www.arichuna.com/images/files/free-minecraft-skin-creator_GM479516143.pdfIn PDF document text
- http://www.arichuna.com/images/files/free-robux-com-real_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/free-robux-hack_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/robux-hack-with-tampermonkey_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/roblox-how-to-get-free-followers_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/roblox-free-chaser-codes_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/roblox-ninja-legends-free-vip-server-2021_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/free-robux-available_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
- http://www.arichuna.com/images/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/hack-robux-into-roblox-account_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/roblox-hack-robux-apk_GM431946152.pdfIn PDF document text
- http://www.arichuna.com/images/files/coin-master-links-free-spins_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_off00002d65.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2D65	22408 bytes
SHA-256: `a02f0991073e9dbd7eafaf6230fded7f7f5864d2f68e21bf76afaaad8a7a6667`
`font_01_sfnt_off00005f73.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5F73	19080 bytes
SHA-256: `5cd26e17e9044f55fd2016feb0b7717245efb1602296708d61af1d0891fbbad2`

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