PDF malware analysis — malicious · ba5a13772a979373

MALICIOUS

PDF

45.8 KB Created: 2021-05-16 01:20:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 5b361d8df6ceca09c85c4a81e13c7046 SHA-1: a476e47ecadb754fabf998d99958d39e8716e933 SHA-256: ba5a13772a97937352ea6ff7205dde047a009315ddbfa8dd9404808aaa0ff427

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links designed to appear as SEO-optimized content, directing users to download applications or related files. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading potentially harmful software. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9432

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/coin-master-3.2-mod-hack-apk-download-game-hack
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-no-offers_GM431946152.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-free-spins-link-blogspot_GM406889139.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/robux-website_GM431946152.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/http-appsmob-info-coin-master-hack_GM406889139.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/codes-to-get-free-robux_GM431946152.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-pet-food-coin-master_GM406889139.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-roblox-promo-codes_GM431946152.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-hack-software-download_GM406889139.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-minecraft-website_GM479516143.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-spin-and-coin-blogspot_GM406889139.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/minecraft-svg-images-free_GM479516143.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/earn-robux-by-watching-ads_GM431946152.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-minecraft-alts_GM479516143.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/roblox-hack-site_GM431946152.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-get-800-robux-for-free_GM431946152.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-get-robux-without-paying_GM431946152.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/get-free-robux-info_GM431946152.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/minecraft-bedrock-download-pc-free_GM479516143.pdf
- https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-roblox-premium_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004c9f.bin` `6f27e4807907484ba35ac03c399e60e28b446c3f1ca5fd6c8b17183eca1bc605`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C9F	24596 bytes
`font_01_sfnt_off000084f4.bin` `3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84F4	2840 bytes
`font_02_sfnt_off00008ea5.bin` `ff135a53a420a418677011958d681f26302d42eb767583c3b8513888fb402d9d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8EA5	18836 bytes

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