PDF malware analysis — malicious · d7ae8eb13e06c77e

MALICIOUS

PDF

42.1 KB Created: 2021-05-19 02:03:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 035779758d632e4b9ab6bac20ea5bf44 SHA-1: a54f2899309fe5b92d7f72c715d2176d7363ba72 SHA-256: d7ae8eb13e06c77ebc3d557a45410a4559e4fd1af2d2578680750829938baf6b

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which point to other PDF documents with SEO-optimized titles related to game hacks and cheats. This indicates a link farm designed to attract users searching for such content. The presence of a download button lure further supports the malicious intent of directing users to external resources. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a mechanism for redirecting users to these malicious 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/406889139/fbchampion-com-game-hack
- http://zercalo.org/images/coin-master-hack-ios-cydia_GM406889139.pdf
- http://zercalo.org/images/free-stuff-on-roblox_GM431946152.pdf
- http://zercalo.org/images/how-to-get-more-robux-for-free_GM431946152.pdf
- http://zercalo.org/images/daily-free-spins-on-coin-master_GM406889139.pdf
- http://zercalo.org/images/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdf
- http://zercalo.org/images/robux-hack-2021_GM431946152.pdf
- http://zercalo.org/images/free-robux-no-human-verification_GM431946152.pdf
- http://zercalo.org/images/pasos-para-hackear-coins-master_GM406889139.pdf
- http://zercalo.org/images/coin-master-hack-without-verification-ios_GM406889139.pdf
- http://zercalo.org/images/blogspot-coin-master-free-spins_GM406889139.pdf
- http://zercalo.org/images/coin-master-free-coins-2021_GM406889139.pdf
- http://zercalo.org/images/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdf
- http://zercalo.org/images/free-ways-to-get-robux_GM431946152.pdf
- http://zercalo.org/images/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdf
- http://zercalo.org/images/cool-minecraft-hacks_GM479516143.pdf
- http://zercalo.org/images/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdf
- http://zercalo.org/images/roblox-studio-free_GM431946152.pdf
- http://zercalo.org/images/free-robux-quiz_GM431946152.pdf
- http://zercalo.org/images/free-robux-gift-card-codes_GM431946152.pdf
- http://zercalo.org/images/how-to-download-minecraft-for-free-on-android_GM479516143.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_off00004886.bin` `4d16544b441f15ac849308835c0750030c9cdd85895919637f4c3716f8c46e76`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4886	25404 bytes
`font_01_sfnt_off00008233.bin` `bf4d3a5aac758f6c252762087d30972ef460d96304da6a0413f0eeb503c51fa6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8233	18364 bytes

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