PDF malware analysis — malicious · 4a7b3434b223b7f5

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 15:26:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: ff429daa7d2ac463b7e7ff2607326adc SHA-1: 49bd9dc27dfffc1c3ba3f7f5f28c370ac17b522a SHA-256: 4a7b3434b223b7f5365393f49261aea58cf4b0fd3ebef91d17f56d1c227f74d5

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document employs a common lure of free game hacks and currency to entice users. It contains a high-risk heuristic firing for a game hack redirect, pointing to the URL http://netcdn.co/app/431946152/free-game-roblox-download-game-hack. This URL is likely used to deliver a second-stage payload or redirect to a phishing site. 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.co/app/431946152/free-game-roblox-download-game-hack PDF link annotation
- https://www.vadai.sg/uploaded_files/userfiles/files/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/roblox-how-create-a-hacking-place_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/robux-hack-2021-febuary-11_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/roblox-hack-game_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-followers-on-tiktok-no-verification_GM835599320.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-hack-a-model-on-roblox_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/can-you-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/generator-robux_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/minecraft-survival-free_GM479516143.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/roblox-knife-capsules-speed-hack_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_off00002e1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E1E	22712 bytes
SHA-256: `99b1ec0516aaa5f4b964eda013e117735183c7151e550b60308138c436c38e24`
`font_01_sfnt_off000060af.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x60AF	19416 bytes
SHA-256: `238a1404017435c4089fc37fac3a02c79fdd3105a5b8671b91105f9939808b97`

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