Malicious PDF — malware analysis report

Static analysis result for SHA-256 1284f64bd1236e8a…

MALICIOUS

PDF

44.2 KB Created: 2021-05-15 04:00:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d70a56053d96e04ce3923b905477e382 SHA-1: e87af3c9ae167e3b5691ccd07e4bc3834e8b1fe5 SHA-256: 1284f64bd1236e8aff9a0c5eca6c03188341a62db4e3bbe5c3bb23f2d926edf6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to files with 'hack' or 'free robux' in their names, suggesting a lure for potentially unwanted or malicious software. The PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a link farm, likely to obscure the true destination or to improve search engine ranking for malicious content. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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/gold-cards-coin-master-hack-game-hack
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/coin-master-hack-app-ios-download_GM406889139.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-robux-codes-generator-no-verification_GM431946152.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/get-free-robux-without-human-verification_GM431946152.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-to-get-robux-without-human-verification_GM431946152.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/100-free-spins-coin-master_GM406889139.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-offers_GM431946152.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-rare-cards-for-coin-master_GM406889139.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/easy-robux-generator_GM431946152.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/roblox-free-printables_GM431946152.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-to-get-20210-robux-for-free_GM431946152.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/master-game_GM406889139.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-minecraft-hacks_GM479516143.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/coin-master-rewards-free-spins_GM406889139.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/links-to-get-free-coins-in-coin-master_GM406889139.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-facebook_GM406889139.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work_GM431946152.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdf
    • https://e-learning.mtsn5sumedang.sch.id/__statics/gudangsoal/files/roblox-svg-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e10.bin
a5d4c28b00f676649e6ba3147ad538c4fd8aa5cb71326bc485079b657b642f78
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E10 27128 bytes
font_01_sfnt_off00008b81.bin
5e7e042928fe04657102bb84442be0bc4eaf21c7bcdf31e92a05fff18f488254
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B81 17964 bytes