PDF malware analysis — malicious · 0bf51f043c37ca96

MALICIOUS

PDF

43.5 KB Created: 2021-05-19 01:31:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11

MD5: 65cb535f3e02ae0907147a82274c5cda SHA-1: 802f0fba30392aa6991f3faebdcbe225cad0672c SHA-256: 0bf51f043c37ca96371722a9c0372c54ab98ba060755da33364a26aa9f5323de

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically targeting users with lures for free Robux and game hacks. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

Heuristics 3

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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
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/huskybus.com-free-robux-game-hack In PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/robloxhacks_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-and-spin_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
- https://www.vadai.sg/uploaded_files/userfiles/files/show-me-how-to-get-free-robux_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_off00004c32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4C32	26936 bytes
SHA-256: `278d539a79862e7fa2bf7ba7d6c1bc38c2ab8b501414d501c2098f2806b7d3f8`
`font_01_sfnt_off00008697.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8697	18688 bytes
SHA-256: `6add98f93d6464e4673e157e466f8eac90a499b9ef5784f234ada041ea0169f0`

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