Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a595d49e8ac431c…

MALICIOUS

PDF

186.3 KB Created: 2015-07-24 03:33:16 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 2de2a67e3fe9cd29596041064ec53f23 SHA-1: 036b3edca980a84561d4c4bbda3f4d08a87b9215 SHA-256: 4a595d49e8ac431c7f1ab1b19ec84a1f06ab7cfbcacad62f7a2c143007972ccf
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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=adguard+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+c+%D0%BA%D0%BB%D1%8E%D1%87%D0%BE%D0%BC+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187284_kris_prentiss_schaste_po_dzen_skachat_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185118_ufo_aftershock_skachat_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185153_vuykrutasuy_igra_na_android_skachat_vzlomannuyu_versiyu.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024467.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24467 3556 bytes
font_01_sfnt_off000251ea.bin
4cd03fd0ec8939b241194c4bfb3075dbbd24c83100fbc79ff8d2875df6d7fe6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x251EA 14424 bytes
font_02_sfnt_off00027ea9.bin
d164636c24c27cb45f958028550ec4ddacbb5522eed591a2ad52d8e069bb5f62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27EA9 14468 bytes
font_03_sfnt_off0002a956.bin
6cf96a7a5dd4eaf7b902a0c8efcc591dacc7ade57759405328fe3acf5c2c851d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A956 7480 bytes
font_04_sfnt_off0002bf44.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BF44 6084 bytes
font_05_sfnt_off0002ced9.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CED9 3752 bytes

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