PDF malware analysis — malicious · 9ca9ebf7318732bb

MALICIOUS

PDF

35.8 KB Created: 2021-07-02 04:47:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 5e1faa1353b91005775f3ceb058a7374 SHA-1: 7a1017175e9f2cb4a0093fbb675c6ccc07dd890b SHA-256: 9ca9ebf7318732bb5d8eed71852c81b9ee7b1a67c8565f58cb07b45b97a5b280

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links to external websites, many of which are designed to appear as free codes or hacks for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a tactic to attract users through search engine optimization. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs points towards a potential download or redirection to a malicious payload.

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.co/app/431946152/redeem-roblox-cards-free-codes-2021-game-hack PDF link annotation
- https://www.wannon.tw/upload/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
- https://www.wannon.tw/upload/files/how-to-get-robux-fast-no-hack-2021_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
- https://www.wannon.tw/upload/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
- https://www.wannon.tw/upload/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
- https://www.wannon.tw/upload/files/how-to-hack-roblox-without-downloading-any-apps_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/roblox-health-cheat_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/roblox-invisible-pants-free_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
- https://www.wannon.tw/upload/files/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
- https://www.wannon.tw/upload/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
- https://www.wannon.tw/upload/files/hack-para-jailbreak-roblox-2021-dinero-infinito_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/roblox-groups-that-give-away-free-robux_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/kazok-roblox-account-hack_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
- https://www.wannon.tw/upload/files/earn-free-robux_GM431946152.pdfIn PDF document text
- https://www.wannon.tw/upload/files/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
- https://www.wannon.tw/upload/files/coin-master-free-spins-may-11-2021_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_off00003389.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3389	22400 bytes
SHA-256: `92cdeab7cfd83f9e194b75b79ecd0cee7144078932d9473f112ab68895847ec3`
`font_01_sfnt_off00006561.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6561	19484 bytes
SHA-256: `51a45613865a40948aa3dbc4ac7e155c22b4d6875acd34472cececd7245a9538`

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