Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af8c3202da197cb…

MALICIOUS

PDF

48.8 KB Created: 2021-05-15 03:32:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ef785b02e132c3577fc3379740200a84 SHA-1: 0774c9a8ec89aff4505edf597030e9818b791fc9 SHA-256: 0af8c3202da197cb4cb9a8aa70a12114e4ae70535ff42d95d8632d86921d41d1
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external resources, many of which are SEO-optimized PDFs related to game hacks and free currency. The ML classifier strongly indicated maliciousness, and the presence of a download button lure further supports a phishing or scam attempt. The document's primary purpose appears to be directing users to these external links, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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/can-you-get-free-robux-on-roblox-game-hack
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-minecraft-windows-10-with-java_GM479516143.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/ways-to-get-free-robux-2021_GM431946152.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/facebook-coin-master-hack_GM406889139.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/minecraft-story-mode-free_GM479516143.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/https-rbx-place-rewards_GM431946152.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/how-many-levels-in-coin-master_GM406889139.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/cm-spin-link_GM406889139.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coin-master-hack-no-verification_GM406889139.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/how-you-get-free-robux_GM431946152.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/arsenal-hacks-roblox_GM431946152.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link_GM406889139.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/cheats-for-coin-master_GM406889139.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coin-master-mod_GM406889139.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-hack_GM406889139.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-2021_GM431946152.pdf
    • https://elearning.mariyadl.sch.id/__statics/gudangsoal/files/daily-free-spins-coin-master-heaven_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005005.bin
ce5fa38701819a1bfce1dd24e3e17de1c56c3576d16db1e3ff8f53363ae02c9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5005 28148 bytes
font_01_sfnt_off000091f3.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F3 2840 bytes
font_02_sfnt_off00009ba5.bin
0d0c29456045ba8700eeeb9b5d08ef238a74b3c73615dbb1a220be23830403a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA5 18580 bytes

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