PDF malware analysis — malicious · bfbf7b7fcef13d65

MALICIOUS

PDF

33.9 KB Created: 2021-06-22 06:43:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02

MD5: 3b5c86b490dd2e66890c37dbad3c1e0b SHA-1: 2169209e230fb8c3a81479017389377f64450ea6 SHA-256: bfbf7b7fcef13d6521dc112b36247c3af1f8edb93ed605f4c060e677efed843c

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.co/app/431946152/robloxmatchcom-free-robux-game-hack PDF link annotation
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/fb-coin-master_GM406889139.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/free-robux-scams_GM431946152.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/robux-for-kids_GM431946152.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/no-human-verification_GM431946152.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
- https://www.kontraktorjogjadiy.com/ckfinder/userfiles/files/hack-coin-master-pc_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
`font_00_sfnt_off00002f4d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F4D	21672 bytes
SHA-256: `971c5b94268042039f61602217bf552d51b14259ec151cb347a1a8f6eb674614`
`font_01_sfnt_off00005ed4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5ED4	19320 bytes
SHA-256: `0d578fc51ad0f188a9c4505a85014dba64e81475c3b1c73d40a415d6db3d1745`

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