PDF malware analysis — malicious · 9f99119215c622f4

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 07:17:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 7e5484fa45d0721bb9ac24ea237ea6eb SHA-1: 5f1327d3b97f2b97a803ee075b8cfae748a7ed42 SHA-256: 9f99119215c622f450bdca249fe4ef6130fdcecab4d95ca88a1079e4e474e69a

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, pointing to external websites. The ML classifier strongly indicates maliciousness, and the presence of a call-to-action phrase suggests a lure. The primary URL, https://netcdn.xyz/app/431946152/how-do-i-get-robux-game-hack, is likely the intended destination for the user, potentially leading to malware download or a phishing attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 4

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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/431946152/how-do-i-get-robux-game-hack PDF link annotation
- http://bibliodetki.ru/images/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
- http://bibliodetki.ru/images/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
- http://bibliodetki.ru/images/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
- http://bibliodetki.ru/images/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
- http://bibliodetki.ru/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
- http://bibliodetki.ru/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
- http://bibliodetki.ru/images/roblox-money-hack_GM431946152.pdfIn PDF document text
- http://bibliodetki.ru/images/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
- http://bibliodetki.ru/images/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
- http://bibliodetki.ru/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
- http://bibliodetki.ru/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://bibliodetki.ru/images/grabpoints-robux_GM431946152.pdfIn PDF document text
- http://bibliodetki.ru/images/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
- http://bibliodetki.ru/images/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
- http://bibliodetki.ru/images/robloxhacks_GM431946152.pdfIn PDF document text
- http://bibliodetki.ru/images/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
- http://bibliodetki.ru/images/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
- http://bibliodetki.ru/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
- http://bibliodetki.ru/images/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
- http://bibliodetki.ru/images/coin-master-spin-link-free_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_003_off000047f4.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x47F4	26576 bytes
SHA-256: `b36d0b4f0a4e74b4c72eb2986d1dc5834d2c97e2d529c41b5db3d7174ce84f5e`
`font_01_sfnt_off00008436.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8436	18284 bytes
SHA-256: `76696481b4f85a4b134e50273d4f72d60bf885136cdb061a204ba21e520483fb`

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