PDF malware analysis — malicious · 4fa543fc606a9a61

MALICIOUS

PDF

45.2 KB Created: 2021-06-10 21:40:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: a6d658b618bc9a9a74de368c71eec3af SHA-1: d5a287a2f1193504099500c8ddeb02d4cb43126c SHA-256: 4fa543fc606a9a6147638dccfdadd3d0df00bb372de42304e617b5f7717d9d96

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 0.9864

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.tw/app/431946152/how-to-get-free-robux-on-pc-2021-game-hack PDF link annotation
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/fake-robux-codes_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/freerobux-co_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-legit-november-2021_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/roblox-robux-generator_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/hack-download_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/is-roblox-studio-free_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/woman-roblox_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.beritabali.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-today_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_004_off0000528f.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x528F	25120 bytes
SHA-256: `00cfbda02aaea52ee8b7d3fa8783a5c4970ae927d637807a48423f8eb7d6465e`
`font_01_sfnt_off00008c6c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8C6C	18836 bytes
SHA-256: `8a741fb407b45497aebd9249a20c5d447dd74f3a427efa88169d6ff4944e1cd3`

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