PDF malware analysis — malicious · 21b99c403e4b37da

MALICIOUS

PDF

42.6 KB Created: 2021-05-19 11:59:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 9010ccc08d89aa8eb552b7f17c6cea55 SHA-1: 48db1dc6e9f2b834495cf97624e21d3cdc0b6eb1 SHA-256: 21b99c403e4b37da83df2ace44acac0764fff1483ee91780a97cc3c8f2d95afe

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 0.9971

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/1330123889/pubg-uc-event-game-hack PDF link annotation
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-free-download-app_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-youtube_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-deals_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-generator-codes_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/roblox-rewards_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/get-me-free-robux_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/free-robux-easy_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
- https://www.mjcorporatemall.com/uploaded_files/userfiles/files/coin-master-mod-version-free-download_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_003_off00004849.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4849	26616 bytes
SHA-256: `2de9816025ae12dffd55db953ef078bbfa22ed4db2645bb8077059a3b88ab51d`
`font_01_sfnt_off00008495.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8495	18116 bytes
SHA-256: `bb844ef43667fb90d677fc88e34405ff1970a204fa0e5d0e7387ebdeac57587f`

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