PDF malware analysis — malicious · c6c723a121536171

MALICIOUS

PDF

42.1 KB Created: 2021-05-17 09:39:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: d7c44e45df18ee27f2f7b8ab73e221a9 SHA-1: 7128918b14ca3041396708d67d341c6c07968dc3 SHA-256: c6c723a1215361712ec8c629216cebbae75f2b7712ec7003ce2a409cd4dac783

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized slugs pointing to game-related freebies, indicating a link farm designed to attract traffic. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a 'download button' heuristic further supports a malicious intent. The primary goal appears to be directing users to potentially malicious websites through these links.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/479516143/best-free-minecraft-texture-packs-game-hack
- http://www.cuniv-naama.dz/images/roblox-free-hair-boy_GM431946152.pdf
- http://www.cuniv-naama.dz/images/free-robux-2021-no-human-verification_GM431946152.pdf
- http://www.cuniv-naama.dz/images/how-to-install-minecraft-for-free-on-ios_GM479516143.pdf
- http://www.cuniv-naama.dz/images/www-roblox-com-free-robux_GM431946152.pdf
- http://www.cuniv-naama.dz/images/haktuts-coin-master-free-daily-spins_GM406889139.pdf
- http://www.cuniv-naama.dz/images/robloxfun-com-robux_GM431946152.pdf
- http://www.cuniv-naama.dz/images/give-me-free-robux_GM431946152.pdf
- http://www.cuniv-naama.dz/images/free-spins-on-coin-master-link_GM406889139.pdf
- http://www.cuniv-naama.dz/images/coin-master-hack-spins-ios_GM406889139.pdf
- http://www.cuniv-naama.dz/images/how-to-hack-coin-master-cheat-engine_GM406889139.pdf
- http://www.cuniv-naama.dz/images/mosttechs-coin-master-free-spins_GM406889139.pdf
- http://www.cuniv-naama.dz/images/free-spins-coins-coin-master_GM406889139.pdf
- http://www.cuniv-naama.dz/images/wurst_GM479516143.pdf
- http://www.cuniv-naama.dz/images/coin-master-email-rewards_GM406889139.pdf
- http://www.cuniv-naama.dz/images/free-attacks-on-coin-master_GM406889139.pdf
- http://www.cuniv-naama.dz/images/coin-master-card-hack-apk_GM406889139.pdf
- http://www.cuniv-naama.dz/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdf
- http://www.cuniv-naama.dz/images/coin-master-free-attack-link_GM406889139.pdf
- http://www.cuniv-naama.dz/images/ways-to-get-free-robux_GM431946152.pdf
- http://www.cuniv-naama.dz/images/free-roblox-card_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off0000498d.bin` `ee9b56f4431340e81561c962674560f9a2eb1e3088ce2581844d9fa7b894b0f5`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x498D	24652 bytes
`font_01_sfnt_off00008204.bin` `31257519935a968b1de16a3a71cb9b2eaae2afa87081bbe73112141ce1027594`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8204	18460 bytes

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