PDF malware analysis — malicious · cd3f11296ad4a768

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 03:42:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: 47920c125fe27e72e9c0f639b7e8007f SHA-1: f11da7f948f552156eeb267a23ad4b922a26847b SHA-256: cd3f11296ad4a7688be379e4c6204e61205d2bcd2aeadb2b1aab5f612573f9bd

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links to external websites, many of which are structured as 'game hacks' or 'free currency generators' for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm or SEO manipulation tactic. The primary URL http://netcdn.tw/app/406889139/coin-master-2021-game-hack appears to be a redirector for malicious content. While no scripts were explicitly extracted, the nature of the links and the ML classification suggest a high likelihood of leading to malicious downloads or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/406889139/coin-master-2021-game-hack PDF link annotation
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/how-to-advance-roblox-hair-for-free_GM431946152.pdfIn PDF document text
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/free-roblox-passwords-2021_GM431946152.pdfIn PDF document text
- https://www.wholesomeliving.in/uploaded_files/userfiles/files/shadowrun-skip-cheat-codes-roblox_GM431946152.pdfIn PDF document text
- https://www.wholesomeliving.in/uploaded_files/userfiles/files/codes-for-roblox-weight-lifting-simulator-3-hack-code_GM431946152.pdfIn PDF document text
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/roblox-for-free-no-signing-up_GM431946152.pdfIn PDF document text
- https://www.wholesomeliving.in/uploaded_files/userfiles/files/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/robux-free-robux-generator_GM431946152.pdfIn PDF document text
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/free-hair-roblox-not-decal_GM431946152.pdfIn PDF document text
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/how-to-make-a-badge-on-roblox-for-free_GM431946152.pdfIn PDF document text
- https://www.wholesomeliving.in/uploaded_files/userfiles/files/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/put-me-on-it-application-free-roblox-on-roblox_GM431946152.pdfIn PDF document text
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/free-robux-no-survey-2021-ios_GM431946152.pdfIn PDF document text
- https://www.wholesomeliving.in/uploaded_files/userfiles/files/how-to-hack-your-roblox-account-to-get-robux_GM431946152.pdfIn PDF document text
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/clothing-making-software-free-roblox_GM431946152.pdfIn PDF document text
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/how-to-download-roblox-hack-2021_GM431946152.pdfIn PDF document text
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/free-roblox-robux-generator-2021-without-human-verification_GM431946152.pdfIn PDF document text
- https://www.wholesomeliving.in/uploaded_files/userfiles/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/free-promo-codes-roblox-for-robux_GM431946152.pdfIn PDF document text
- http://www.wholesomeliving.in/uploaded_files/userfiles/files/free-coins-on-coin-master_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
`stream_002_off00003276.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3276	23096 bytes
SHA-256: `c2ee4afca93c1dd3b2a0437cce5407d51f606d2295725520ac393b2ceb62cf67`
`font_01_sfnt_off0000667e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x667E	18236 bytes
SHA-256: `ee20fae09ad4742887cf3ae2f1dc7b8177075f029557999e2b01a65596e64057`

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