Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ac8990ec5840251…

MALICIOUS

PDF

187.5 KB Created: 2015-07-23 20:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: af6a4d3f87ca1c7296fddae427e931ee SHA-1: 5975b01f6ef737666537631e3504124f8298ce7d SHA-256: 4ac8990ec5840251d4cc0195392bbbbf932689cff694c4ee887c6f6f737fba7b
90 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. The primary malicious IOC is the redirector URL, which is likely used to lead the user to a phishing site or initiate a malware download. No scripts were extracted from this sample.

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%B4%D0%B5%D0%B2%D1%83%D1%88%D0%BA%D0%B0+%D0%BA%D0%BE%D1%82%D0%BE%D1%80%D0%B0%D1%8F+%D0%B2%D0%B7%D1%80%D1%8B%D0%B2%D0%B0%D0%BB%D0%B0+%D0%B2%D0%BE%D0%B7%D0%B4%D1%83%D1%88%D0%BD%D1%8B%D0%B5+%D0%B7%D0%B0%D0%BC%D0%BA%D0%B8+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183253_nacionalnuyy_proekt_dostupnoe_i_komfortnoe_zhile.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184380_igra_moya_strana_2020_dlya_kompyutera_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184458_videokarta_gigabyte_d33006_drayver.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024932.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24932 3556 bytes
font_01_sfnt_off000256b5.bin
040b41dc4fd41721580af842bdaa926671f3299d1b18778b02b615e15e82eb0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x256B5 14824 bytes
font_02_sfnt_off000284ad.bin
c521cb7f32363069232cb6cf023e13d81dfc7f2346484feaa89f0b3c8cd570ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x284AD 14520 bytes
font_03_sfnt_off0002af7f.bin
30df1b6b415a7fadbe1f66195990937c1068cef8841ee7320a2feb14cd84d479		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF7F 7072 bytes
font_04_sfnt_off0002c406.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C406 6084 bytes
font_05_sfnt_off0002d39b.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D39B 3752 bytes

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