PDF malware analysis — malicious · 3457f30cf4aec8cf

MALICIOUS

PDF

45.0 KB Created: 2021-05-16 18:46:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 21873bfca60d890a52ae57030c3a6042 SHA-1: 8cae2a5ed0af789995ef5b22ba5081b59a5f0d16 SHA-256: 3457f30cf4aec8cfe9308811a4183c27b56e39df4ed8f2cf99f76672ab17cd42

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are part of a link farm, pointing to websites offering game cheats and free in-game currency. The ML classifier and PDF heuristics strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. No scripts were extracted, but the presence of a link farm and external URIs suggests a watering hole or phishing attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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-to-earn-robux-by-playing-games-game-hack PDF link annotation
- http://mklista.ru/images/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
- http://mklista.ru/images/free-robux-without-verify_GM431946152.pdfIn PDF document text
- http://mklista.ru/images/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
- http://mklista.ru/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- http://mklista.ru/images/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
- http://mklista.ru/images/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
- http://mklista.ru/images/roblox-people-girl_GM431946152.pdfIn PDF document text
- http://mklista.ru/images/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- http://mklista.ru/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
- http://mklista.ru/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
- http://mklista.ru/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
- http://mklista.ru/images/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
- http://mklista.ru/images/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
- http://mklista.ru/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
- http://mklista.ru/images/minecraft-for-macbook-free_GM479516143.pdfIn PDF document text
- http://mklista.ru/images/real-robux-codes_GM431946152.pdfIn PDF document text
- http://mklista.ru/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
- http://mklista.ru/images/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
- http://mklista.ru/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
- http://mklista.ru/images/how-to-get-free-robux-games_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
`stream_003_off00004aca.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4ACA	28088 bytes
SHA-256: `d6cb02733e607bfdfc95fd67ffc0fc61b6d519eaea04146e0aa3bad575c05810`
`font_01_sfnt_off00008a91.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8A91	19320 bytes
SHA-256: `a1584dac0915afffe374fd321a91a63158f116b97d599b0b15246117d282c726`

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