Malicious PDF — malware analysis report

Static analysis result for SHA-256 1286deb9aead2270…

MALICIOUS

PDF

45.4 KB Created: 2021-06-07 03:41:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f989a62a676b4c0d83990bfe07a7891f SHA-1: 55fe88bddd10410bf09694f1730662beb61e0f94 SHA-256: 1286deb9aead22707fee225fe37bdaafb9a6d0c9475cd0bcb470b1e22bcea626
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external sites, many of which appear to be part of a link farm designed to distribute game cheats and potentially malicious software. The document body and extracted URLs suggest a lure for users seeking 'Roblox Hack Robux' or 'Coin Master Free Spin' content. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of a link farm and external URIs, pointing towards a malicious download or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/descargar-roblox-hack-robux-para-pc-game-hack
    • https://diendientuvn.com/public/upload/files/roblox-royale-high-diamond-hack_GM431946152.pdf
    • https://diendientuvn.com/public/upload/files/daily-free-spin-link-for-coin-master_GM406889139.pdf
    • https://diendientuvn.com/public/upload/files/roblox-free-robux-codes_GM431946152.pdf
    • https://diendientuvn.com/public/upload/files/coin-master-free-coins-and-spins_GM406889139.pdf
    • https://diendientuvn.com/public/upload/files/free-robux-generator-2021-no-survey_GM431946152.pdf
    • https://diendientuvn.com/public/upload/files/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • https://diendientuvn.com/public/upload/files/minecraft-for-free-apk_GM479516143.pdf
    • https://diendientuvn.com/public/upload/files/free-spins-coin-master_GM406889139.pdf
    • https://diendientuvn.com/public/upload/files/free-role-in-coin-master_GM406889139.pdf
    • https://diendientuvn.com/public/upload/files/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • https://diendientuvn.com/public/upload/files/static-moonactive-net-free-spins-coin-master_GM406889139.pdf
    • https://diendientuvn.com/public/upload/files/how-to-get-free-robux-hack_GM431946152.pdf
    • https://diendientuvn.com/public/upload/files/minecraft-hack-app_GM479516143.pdf
    • https://diendientuvn.com/public/upload/files/free-spins-coin-master-2021-no-verification_GM406889139.pdf
    • https://diendientuvn.com/public/upload/files/coin-master-free-blogspot_GM406889139.pdf
    • https://diendientuvn.com/public/upload/files/mcpe-master-hack-coin-apk_GM406889139.pdf
    • https://diendientuvn.com/public/upload/files/free-robux-apk_GM431946152.pdf
    • https://diendientuvn.com/public/upload/files/free-minecraft-hosting-24-7_GM479516143.pdf
    • https://diendientuvn.com/public/upload/files/free-links-for-coin-master_GM406889139.pdf
    • https://diendientuvn.com/public/upload/files/free-robux-websites-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005227.bin
0cf4265f5b694f3fb14b39055e45cd65c1cb7ca4927c261758c2d07a33b64399
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5227 26112 bytes
font_01_sfnt_off00008cdd.bin
b488ef341e2e2bbd66980a499d3a993acba08d0f841392f05ade2b021abc152f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDD 18932 bytes