PDF malware analysis — malicious · f63397469b810d76

MALICIOUS

PDF

44.7 KB Created: 2021-05-19 09:59:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: ff5cd3bac5d47dc150317de45bfacb36 SHA-1: e791c07605c2e669e8b69ddc243aeeef3472acdd SHA-256: f63397469b810d76c1e43c9c917594aff8a4b6a381ff8d5254aa0fad66b48522

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which point to SEO-optimized PDF files, suggesting a link farm or SEO manipulation tactic. One URL, 'https://netcdn.xyz/app/835599320/is-tiktok-free-on-ipad-game-hack', is directly embedded and likely serves as a lure. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the PDF structure itself facilitates the distribution of malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9632

Heuristics 5

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.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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/835599320/is-tiktok-free-on-ipad-game-hack PDF link annotation
- https://mawaridschools.com/uploaded_files/userfiles/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/real-roblox_GM431946152.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/coin-master-hack-tips_GM406889139.pdfIn PDF document text
- https://mawaridschools.com/uploaded_files/userfiles/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off000045e5.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x45E5	24592 bytes
SHA-256: `46944d3f6cd877fdb57a7b72b0ab81abb7318244758ed265c07db6f01c2b52fd`
`font_01_sfnt_off00007e9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7E9D	4212 bytes
SHA-256: `d44660e3dad5dc7f6e34a43e0eb92a75f147d489cdb62e2117f557be3506187f`
`font_02_sfnt_off00008cac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CAC	18036 bytes
SHA-256: `8347bb26055910304e4b5aa0c1166454432982af0c4bbaf80b126e13b102b041`

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