PDF malware analysis — malicious · b9b91755ac5cc96f

MALICIOUS

PDF

44.5 KB Created: 2021-05-16 20:02:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04

MD5: 34e9d9bb5d7bbd2f65664fed997bc489 SHA-1: 96de43ebb32258da8973e19208171a21e4d5b508 SHA-256: b9b91755ac5cc96f7e1f3f075f71a03c5d9da10a0489a02cba0cfe047c142cd4

82 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

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 https://netcdn.xyz/app/431946152/free-robux-no-verification-at-all-game-hack PDF link annotation
- https://www.wellonaindia.com/uploaded_files/userfiles/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/roblox-skin-free_GM431946152.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/free-roblox-items-codes_GM431946152.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/free-coin-master-cards-link_GM406889139.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
- https://www.wellonaindia.com/uploaded_files/userfiles/files/roblox-inappropriate-games_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
`stream_003_off00004d08.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4D08	27340 bytes
SHA-256: `f58b16ac11a4e291d256c31619f8dac340b42fb0e220b02ced47069aabe24a4c`
`font_01_sfnt_off00008a8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A8C	18676 bytes
SHA-256: `a2274236a7a2e18adabb7b86c58cf77696514c901240e043c32ff4f0260e6091`

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