Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb398df6f44b606e…

MALICIOUS

PDF

55.1 KB Created: 2021-06-02 16:17:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8c80e649778739898a4c7b48645e47da SHA-1: dc8a07c19cf59cc8a92be4b94015278b305844ce SHA-256: eb398df6f44b606ef9d38cfe9b0831c55bbf922a29a348e97f53c302f799eead
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to attract traffic. The document body and extracted URLs indicate a lure related to "hacking" games like Roblox and Coin Master. While no scripts were directly extracted, the PDF structure and extensive external linking are indicative of a malicious workflow, likely involving the exploitation of PDF vulnerabilities to redirect users or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9649

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/431946152/como-convertirse-en-hacker-en-roblox-game-hack
    • http://behsanroshd.com/images/make-free-robux_GM431946152.pdf
    • http://behsanroshd.com/images/how-to-get-20210-robux-for-free_GM431946152.pdf
    • http://behsanroshd.com/images/free-robux-by-watching-ads_GM431946152.pdf
    • http://behsanroshd.com/images/coin-master-free-coins-today_GM406889139.pdf
    • http://behsanroshd.com/images/omplete-surveys-for-coin-master-free-spins_GM406889139.pdf
    • http://behsanroshd.com/images/free-spins-on-coin-master-without-human-verification_GM406889139.pdf
    • http://behsanroshd.com/images/mcpe-master-hack-unlimited-coins-download_GM406889139.pdf
    • http://behsanroshd.com/images/roblox-hacks-2021_GM431946152.pdf
    • http://behsanroshd.com/images/coin-master-free-coins-2021_GM406889139.pdf
    • http://behsanroshd.com/images/coin-master-free-spins-and-coins-for-today_GM406889139.pdf
    • http://behsanroshd.com/images/minecraft-free-download-mac_GM479516143.pdf
    • http://behsanroshd.com/images/free-spin-gratis-coin-master_GM406889139.pdf
    • http://behsanroshd.com/images/roblox-free-clothes-codes_GM431946152.pdf
    • http://behsanroshd.com/images/free-robux-no-downloading-apps_GM431946152.pdf
    • http://behsanroshd.com/images/free-minecraft-server_GM479516143.pdf
    • http://behsanroshd.com/images/roblox-studio-free-robux_GM431946152.pdf
    • http://behsanroshd.com/images/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • http://behsanroshd.com/images/free-tiktok-followers-instantly_GM835599320.pdf
    • http://behsanroshd.com/images/hacks-to-get-free-robux_GM431946152.pdf
    • http://behsanroshd.com/images/how-to-hack-someone-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052f4.bin
1df07719f75904fcfad89e2307f9c6cbb7a006e428977ba1a75d64e9e537ebc8
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F4 24748 bytes
font_01_sfnt_off00008bc7.bin
db399d969d9309c9c38cb6e3c43aa83c06d227a5470715de93176d1df1e6747d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC7 12800 bytes
font_02_sfnt_off0000b3a3.bin
0c6bc1f220424c4c3fdeb6037e469408b436d3bcec605767ae26d87b0a758fbc
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A3 18780 bytes