PDF malware analysis — malicious · 51d8aa886905223b

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 08:54:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29

MD5: acb3d7378bc957ad1d09039ae54ecd50 SHA-1: 7438daf0d908f47f4b6daf09b39c2bd8ac34bdb6 SHA-256: 51d8aa886905223bf77aeb1788965418bcc299d4ba023d82114276fee1676da1

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.tw/app/431946152/free-robux-working-game-hack PDF link annotation
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/roblox-free-draw_GM431946152.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/cheat-engine-table-roblox_GM431946152.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/roblox-cheat-menu-download_GM431946152.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/free-robux-cards-me-com_GM431946152.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/music-hacker-roblox_GM431946152.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/shadow-hacker-roblox_GM431946152.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.shoppingmart.ie/uploaded_files/userfiles/files/free-roblox-gift-card-codes-2021-november_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
`font_00_sfnt_off00002fbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2FBB	22436 bytes
SHA-256: `34be65e4fca464181cffc58bce45ec8f90b81a9c054da5675adeff0f0f5600ed`
`font_01_sfnt_off00006197.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6197	19204 bytes
SHA-256: `ce738487085ad599441484df9d90a1a143049edc5affa9a85a5d558c4f13480e`

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