PDF malware analysis — malicious · 7f609c79ea73b04e

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 15:16:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 9e3270143318adc5e3b05b1c55aadea3 SHA-1: 923d4da720110e249bd63a53d4173dcc69953171 SHA-256: 7f609c79ea73b04e9e934dc223cf12088c303cd5360a365cd76f768fb1893898

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a lure for free Robux and game hacks, directing users to the URL http://netcdn.tw/app/431946152/how-to-earn-free-robux-game-hack. This heuristic firing, combined with the ML classifier's high confidence, indicates a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the embedded URL is a primary indicator of the attack.

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-earn-free-robux-game-hack PDF link annotation
- https://www.modestuae.com/uploaded_files/userfiles/files/https-webrobloxcom-catalog-202120215-hacked_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/free-robux-giveaway-live-now_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/roblox-2021-anti-cheat_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/free-robux-website_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/how-to-make-group-in-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/how-to-use-chatbot-hack-roblox-not-working_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/free-robux-apps-that-dont-use-adgates_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/hack-icebreaker-roblox_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/murder-mystery-hacks-roblox_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/free-robux-in-one-second_GM431946152.pdfIn PDF document text
- https://www.modestuae.com/uploaded_files/userfiles/files/minecraft-svg-free_GM479516143.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_off00003078.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3078	22648 bytes
SHA-256: `ef093e52feff4aaaff1c5cdc195db2138acb3c96dab61c1b891135be905f9d49`
`font_01_sfnt_off0000631f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x631F	18880 bytes
SHA-256: `a522bee010909c1dfdd5b814bfadf8c7715ebc59745b399d37c475b37c42e617`

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