PDF malware analysis — malicious · c9de9fb2adfc831f

MALICIOUS

PDF

35.7 KB Created: 2021-07-03 19:13:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 5b1d1c8e592a46fa1fcf0ee211218d3f SHA-1: a630674b4893630c54f2105ec09ae88b8556b918 SHA-256: c9de9fb2adfc831f4ff6ee59a69d45e0c9d0affd530078a3c234c70463e047d3

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was identified as malicious by an ML classifier and contains numerous external links, many pointing to files with 'hack' or 'free' in their names. The document body and extracted URLs suggest a lure for game-related cheats or exploits, likely leading to malware download. The presence of a PDF URI heuristic and a link farm heuristic indicates a deliberate attempt to distribute malicious content.

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 http://netcdn.tw/app/406889139/coin-master-free-cards-link-2021-game-hack PDF link annotation
- https://www.failtesolar.com/uploaded_files/userfiles/files/synapse-hack-roblox-download-free_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/master-free-spin_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/free-robuxrblx-file_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/how-to-get-free-robux-groups_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/roblox360com-free-robux_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/roblox-prison-life-hack-script-infinite-ammo_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/roblox-hack-no-human-verification-safe_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/how-to-create-items-in-roblox-free_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/how-to-make-a-shirt-in-roblox-free-2021_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/best-free-roblox-games-to-exploits_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/free-robux-console-pastebin_GM431946152.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
- https://www.failtesolar.com/uploaded_files/userfiles/files/coin-master-spin-hack-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
`stream_002_off000032cc.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x32CC	23268 bytes
SHA-256: `2f987b990b19fd4ebb40de736ebbdcbd34d1f795d2efa9bfc7eac830b2921709`
`font_01_sfnt_off0000675f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x675F	18744 bytes
SHA-256: `30a2c575023908b4f2873a2c506cf1dd7d4cce6c2b03b20b5a33b18f82d0ec48`

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