PDF malware analysis — malicious · b809a55dcd7bdbc0

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 08:23:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 2c4a2f265d413b2b19f71a2c8a62b06e SHA-1: 566fa7f96992cf3e7d750f234ead002d8749f010 SHA-256: b809a55dcd7bdbc013c831da77028fc85f12b1d77075c6427c9ba6f4e69ec032

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-free-spins-link-download-hack-game-hack PDF link annotation
- https://klp.com.tr/inc/uploads/userfiles/files/free-robux-pins_GM431946152.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/how-to-know-if-your-being-hacked-on-roblox_GM431946152.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/coin-master-codes_GM406889139.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/app-cheats-online-roblox_GM431946152.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/free-account-roblox-2021_GM431946152.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/daily-spin_GM406889139.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/roblox-774-hack_GM431946152.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/https-web-roblox-com-robux-free_GM431946152.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/script-injector-roblox-free_GM431946152.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/hacks-roblox-robux-2021_GM431946152.pdfIn PDF document text
- https://klp.com.tr/inc/uploads/userfiles/files/free-pro-tiktok_GM835599320.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_off0000316e.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x316E	23100 bytes
SHA-256: `7b5db5d8bd711d664587de9b3eba88b5b3a41a27154130f66e0c4ff78c042dd9`
`font_01_sfnt_off00006567.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6567	18924 bytes
SHA-256: `e987de95c71b54d77bff4d31366d2d96c0c1c0c84cc5d45c6fa9b96ee99b38ec`

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