Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8283133827eebf2…

MALICIOUS

PDF

187.6 KB Created: 2015-07-23 20:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f4b228d0d94f98e18b9a50b808cefd5b SHA-1: b9c31720645aad1c740498d959a8bb3e450fc8bb SHA-256: f8283133827eebf24424c00ae1d6c0f7b9151693295d4fedce5dba9b447fdae1
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for a link to known malicious redirector infrastructure. The embedded URL points to 'botcraftman.ru', which is associated with malicious activity. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector link is sufficient to classify the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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.
  • ClamAV: Pdf.Dropper.Agent-7495134-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7495134-0
  • 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%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BC%D0%B0%D0%B9%D0%BD%D0%BA%D1%80%D0%B0%D1%84%D1%82+095+%D0%BD%D0%B0+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4+422+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183250_primer_deklaracii_3ndfl_pri_prodazhe_mashinuy.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183261_deesposobnost_fizicheskogo_lica_shema.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184295_skachat_mp_flooder.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000248c3.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x248C3 3556 bytes
font_01_sfnt_off00025646.bin
4c18b0453e2abceaa9995d6be05761479e99790d6428706c9228875a535e0cf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25646 14344 bytes
font_02_sfnt_off000283aa.bin
9ae38f1872d8b7200304fbfdebe9cb10dd1164c1b84cc6a1cf2cb48b3a885a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x283AA 14640 bytes
font_03_sfnt_off0002aede.bin
b1c84853cc818212ce365f39eb8e73d905e73e814cb984fb5f90f3ceaa5b5044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AEDE 7404 bytes
font_04_sfnt_off0002c4a7.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4A7 6084 bytes
font_05_sfnt_off0002d43c.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D43C 3752 bytes

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