Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b862e4f0073c3bc…

MALICIOUS

PDF

356.0 KB Created: 2015-08-24 00:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: be05533582243bc57971aef76d962278 SHA-1: f49a3596d147f002b5ba941f04498fbad32cb5b3 SHA-256: 5b862e4f0073c3bcc6601a98d4f2b672511e55a2e14345f55300e83673dd5ed7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as a dropper and by a machine learning classifier as malicious. It contains an embedded URL that points to a known malicious redirector. The PDF structure and embedded content suggest it is designed to exploit vulnerabilities or trick the user into visiting the malicious link, which is a common initial access vector for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-9374710-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9374710-0
  • 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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+sovngard+pw&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694014_kartuy__navitel__nm2_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693320_shpargalki__po__farmacevticheskoy_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693824_devochki__podrostki_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054438.bin
d4b87755d8feeb725708e66b112f95ed7051eef1bf7e9ef4d6ab505011862093		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54438 10060 bytes
font_01_sfnt_off000560b2.bin
0519128890c965d9e00fff6c6f6868df7bb99f0ff95ffa6e3660f7e6108f0085		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560B2 15468 bytes

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