PDF malware analysis — malicious · 39bdbf0eb5910a57

MALICIOUS

PDF

44.7 KB Created: 2021-05-13 15:12:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: ffbaef79e6d8f9156a13efbbab0ef601 SHA-1: 9b56aaf20565e7d6a047d7b354a2b800b3dfde2f SHA-256: 39bdbf0eb5910a574d9d267844b3c7a6ae5ffd2e7e86165936cfea33fb063ca3

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 0.9632

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/406889139/coin-master-tiradas-gratis-game-hack PDF link annotation
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/coin-master-game_GM406889139.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
- https://bisnisrakminimarket.com/ckfinder/userfiles/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004b48.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B48	24616 bytes
SHA-256: `8a632acb7ff891710a623c2e48c550980d5a7cad4d4b8eff51af9a5716cbe42f`
`font_01_sfnt_off000083e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x83E8	2840 bytes
SHA-256: `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`
`font_02_sfnt_off00008d9a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D9A	17720 bytes
SHA-256: `8f572e18194144161629560968b1be47f6d3ca2e707ed2c38e953a7df1c42241`

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