Malicious PDF — malware analysis report

Static analysis result for SHA-256 db3e71dfba92ae43…

MALICIOUS

PDF

188.4 KB Created: 2015-07-23 20:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e9119a11bd9042acb38feaf0fac51d7d SHA-1: f53e170634f5363bca838f151ad3d46073ca5220 SHA-256: db3e71dfba92ae43419d0cd9a20549c81f8e1620a4129d14ef501621254f0376
152 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 linking to known malicious redirector infrastructure. The primary malicious IOC is the URL http://botcraftman.ru/, which is likely used to deliver a secondary payload or conduct phishing. The ClamAV detection name 'Pdf.Dropper.Agent-7429704-0' further supports its role as a dropper.

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-7429704-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7429704-0
  • 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%A2%D0%B5%D0%BE%D1%80%D0%B8%D1%8F+%D0%B3%D0%BE%D1%81%D1%83%D0%B4%D0%B0%D1%80%D1%81%D1%82%D0%B2%D0%B0+%D0%B8+%D0%BF%D1%80%D0%B0%D0%B2%D0%B0+%D0%B0%D1%83%D0%B4%D0%B8%D0%BE%D0%BA%D0%BD%D0%B8%D0%B3%D0%B0+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%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//4183/4183200_lampovuyy_peregruz_shema.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183258_proekt_doma_5_na_5.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183181_kuryatnik_shema.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000250c5.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x250C5 3556 bytes
font_01_sfnt_off00025e48.bin
403e7b9eb75544fdaae46c37f5e035d112fd0316c8eb4af3359aa178088eaf44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25E48 14056 bytes
font_02_sfnt_off00028a3c.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28A3C 14468 bytes
font_03_sfnt_off0002b4ee.bin
d479d77977e8d2f4bd84993ba344f02b29c02c0b69e35b43bea069a8383d7ad0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B4EE 6644 bytes
font_04_sfnt_off0002c7f1.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7F1 6084 bytes
font_05_sfnt_off0002d786.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D786 3752 bytes

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