Malicious PDF — malware analysis report

Static analysis result for SHA-256 218d0d178c98d53d…

MALICIOUS

PDF

273.3 KB Created: 2015-08-26 10:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 8e07c7bd8b045bedcf8f50d9148b74a1 SHA-1: df4c74a6c36144bd2fad9bce9973692044d1f9a5 SHA-256: 218d0d178c98d53d1830595a9f9e93cc9f5bf2d0b0724e060dbfd6c2ce26c692
68 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains an embedded JavaScript stream and a critical heuristic firing indicates a link to known malicious redirector infrastructure. The primary malicious IOC is the redirector URL, which is likely used to lure users to a phishing or malware distribution site. No specific malware family was identified.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://botcraftman.ru/?lip&keyword=%D0%98%D0%BD%D1%81%D1%82%D1%80%D1%83%D0%BA%D1%86%D0%B8%D1%8F+%D0%BF%D0%BE+19%D0%B66&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751923_kulturologiya__uchebnik__dlya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751868_otvetuy__po__rabochey_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751681_olimpiada__po__russkomu_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00040048.bin
d7e4b28c96258e5ddc6faa81ac9847d529f1a063d32a0e9977906713ca433060		 pdf-font-stream PDF embedded font (sfnt) at offset 0x40048 8752 bytes
font_01_sfnt_off000418ae.bin
a2edf92afab56ef2804132b9134c622a663366f86629a565302b66412eff8cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x418AE 14084 bytes

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