PDF malware analysis — malicious · d4efa0bf705c3581

MALICIOUS

PDF

35.5 KB Created: 2021-07-07 04:34:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: b97a01da8c0aadd3d465858ea2d045d7 SHA-1: 1592415e2a3fd626b06046458fdbf9c1995460ce SHA-256: d4efa0bf705c35810928191c33e3640a97c994f554d1301e58e616bdb10f7735

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 http://netcdn.tw/app/406889139/coin-master-hack-2021-app-game-hack PDF link annotation
- https://zarco.co.in/uploaded_files/userfiles/files/injet-cheats-roblox_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/e-free-in-roblox_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-robux-no-human-verification-at-all_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/how-to-cheat-at-boku-no-roblox-remastered_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/coin-master-daily-spins_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/coin-master-hack-cheat-engine_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/roblox-hack-menu-download-pc_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/how-to-hack-into-games-on-roblox_GM431946152.pdfIn PDF document text
- https://zarco.co.in/uploaded_files/userfiles/files/rbx-com_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_002_off00003135.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3135	23576 bytes
SHA-256: `6fb25116dab586375b4a166c8fc4814eb87a8e6accf3fd034f0809179ce821b3`
`font_01_sfnt_off000066e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x66E5	18580 bytes
SHA-256: `9ee7f6e729eaa8ccfa60f836f488dcd9dbdf367b2dcb4736acc286b6369c8b6e`

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