Malicious PDF — malware analysis report

Static analysis result for SHA-256 11bdb4715098e347…

MALICIOUS

PDF

349.6 KB Created: 2015-08-22 09:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 3f1bd6894b8e63072c58ada2101e1be5 SHA-1: 23f813142854da313e5f686e09d658fd4587b25d SHA-256: 11bdb4715098e347a28a00b60a9362974f6207ee4fc026da437e09fd934225eb
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, but the primary threat appears to be the redirection to the malicious domain, likely to lure users into a scam or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 2

  • 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 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%BA%D0%B0%D0%BA+%D0%BF%D0%BE%D0%BB%D1%83%D1%87%D0%B8%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%B3%D0%BE%D0%BB%D0%B4%D1%83+%D0%B2+world+of+tanks&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674767_tablica_perevoda_metizov_iz_kg_v_sht.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674808_gazeta_7_dney_chitat_onlayn.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674851_skan_tu_gou_smotret_onlayn_vse_serii_podryad_na_russkom.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052bab.bin
b4061d581b73b232ad22daeb98b86a194065f3a59c404588dcfffff786888c55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BAB 9384 bytes
font_01_sfnt_off0005460f.bin
a085d7d8ff92d3c531a9b1d15fc736269b56e87dc0d13d42a4ff4f5c1679157e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5460F 15608 bytes

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