Malicious PDF — malware analysis report

Static analysis result for SHA-256 721a44dbafa36137…

MALICIOUS

PDF

183.5 KB Created: 2015-08-06 09:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 54106d1ff506be405ea9537788f06d53 SHA-1: f19a89e368442656a33740c593ded7e8b274f033 SHA-256: 721a44dbafa36137bf9dc688a344be4b6425bdfee9cabec6b7324c3272bdbf6f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, specifically for containing a link to a known malicious redirector. The ML classifier also assigned a high probability of maliciousness. The embedded URL is likely part of a phishing or malware distribution scheme, aiming to lure the user to a compromised site.

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=%D0%B1%D0%BE%D1%82%D1%8B+%D0%B4%D0%BB%D1%8F+%D0%B7%D0%B0%D1%80%D0%B0%D0%B1%D0%BE%D1%82%D0%BA%D0%B0&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304995_skachat_vindovs_7_zver_2014_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4308/4308384_igruy_po_lokalnoy_seti_na_prohozhdenie.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305901_skachat_besplatno_knigu_pohoronite_menya_za_plintusom.pdf
    • http://www.microsoft.com/typography/fonts/
    • http://www.microsoft.com/typography/fonts/You

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023d30.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23D30 3556 bytes
font_01_sfnt_off00024ab3.bin
6a2cf678088ecb531e18e0498b6aed1dd3e661633a31c3492b69d80dcd5742a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24AB3 14092 bytes
font_02_sfnt_off00027732.bin
163142455a5560a1f6759d0ead96de5f50a47653c77b96353ea21901cf90e8c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27732 14468 bytes
font_03_sfnt_off0002a1e6.bin
b749efba81e7ddf1801761074208d038720e0248de15e4fb01ebc328b66c6cd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1E6 6440 bytes
font_04_sfnt_off0002b419.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B419 6084 bytes
font_05_sfnt_off0002c3ae.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C3AE 3752 bytes

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