PDF malware analysis — malicious · c1bfba6f6352af59

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 11:28:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25

MD5: 85a8e4ef1190d1b2043a3788c5fc518f SHA-1: de178abe4ddad969493c001a76dbcce1c306b134 SHA-256: c1bfba6f6352af599a14047b01676c6777d06af1a998fdcc1f79dd434f17ef13

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/431946152/play-roblox-free-online-game-hack PDF link annotation
- https://www.cow-style.com.tw/upload/files/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/get-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-hack-program-download_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/tankery-roblox-cheat_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-robux-for-everyone_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/free-robux-now_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/knife-ability-test-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/que-pasa-si-mientes-al-hacker-de-roblox_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/hack-roblox-cheat-engine-bypass_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/roblox-cheats-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.cow-style.com.tw/upload/files/how-to-earn-free-roblox_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
`font_00_sfnt_off0000356b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x356B	22320 bytes
SHA-256: `0b371ab73516a5e13b1479827f4ff18f4485d505b2d55c835142f0773c25de36`
`font_01_sfnt_off00006703.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6703	19104 bytes
SHA-256: `5dec955baf3711e79836f4e6ad4fb1b584691504afeaf703317c1f8e1f5dda9f`

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