PDF malware analysis — malicious · 55b8381204017f6e

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 23:53:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 637dad847ec75c8ed58a75a3ec529100 SHA-1: a9c6aa32e5feb107a6807161fec22f6ded8e5500 SHA-256: 55b8381204017f6eeb46272c3cec3ad0568c903308d6b0bee1c19e9a4d1cab17

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

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.tw/app/431946152/how-to-hack-a-roblox-account-easy-game-hack PDF link annotation
- http://www.donjastubica.hr/files/but-link-sayd-free-robux_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/robux-hack-dot-net_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/pubg-uc-via-easypaisa_GM1330123889.pdfIn PDF document text
- http://www.donjastubica.hr/files/coin-master-hacking-news_GM406889139.pdfIn PDF document text
- http://www.donjastubica.hr/files/free-roblox-shop_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/roblox-cheat-way-up-volcano-lumber-tycoon-2_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/free-stuff-in-roblox-august-2021_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/javascript-free-robux_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-robux-no-hack-2021_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/roblox-hack-apk-unlimited-robux_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/coin-master-facebook_GM406889139.pdfIn PDF document text
- http://www.donjastubica.hr/files/minecraft-free-reddit_GM479516143.pdfIn PDF document text
- http://www.donjastubica.hr/files/roblox-free-draw_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/roblox-lawsuit_GM431946152.pdfIn PDF document text
- http://www.donjastubica.hr/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
- https://www.donjastubica.hr/files/hack-coin-master-2021_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_off00002fd3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FD3	22112 bytes
SHA-256: `000a5d53c0bca396e2f76e99c84af6dd1d3043ca0fabfae0143d109150ec8e49`
`font_01_sfnt_off000060c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60C4	19244 bytes
SHA-256: `4dcbe17bebf2382ad99832b5327dd7065748ff6dacf6eb853322815bf961736f`

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