Malicious PDF — malware analysis report

Static analysis result for SHA-256 983382950970a711…

MALICIOUS

PDF

38.4 KB Created: 2021-05-16 01:20:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4b334d44b35cf9580d11208400d10bb2 SHA-1: dd4d75b0a134b49bc209ba5e9423eceff59ac92d SHA-256: 983382950970a71168d35850b1042c3a351952589f65b6579ccc2c5a20a890b9
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links pointing to external websites, many of which appear to be part of a link farm designed to distribute applications. The document body and extracted URLs suggest a lure related to obtaining in-game currency or modified applications, indicating a potential attempt to trick users into downloading malware or unwanted software. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 3

  • 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.
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
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