Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d9023bf6219130…

MALICIOUS

PDF

376.9 KB Created: 2015-08-26 09:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: fc48cc1451cdbbee730854f48e746bab SHA-1: 0ee3673664ad8e3486858011eb64ceeef1ab97f8 SHA-256: 78d9023bf6219130612cb26bf0f0d0d116e1bf71e10994fd208274e0fbdf648e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, appears to contain keywords related to software downloads, suggesting a lure to trick users into clicking the malicious link. The presence of embedded URLs and the nature of the heuristics point towards an attempt to deliver a secondary payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+windows+7+home+basic+64+bit+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+%D0%BE%D1%80%D0%B8%D0%B3%D0%B8%D0%BD%D0%B0%D0%BB&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751670_opera__mini__na_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752089_skachat__moduy__dlya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751808_directx__12___.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000596a4.bin
f389d22b621f29203eb8a1ca0619f87b9b3b5dc7a0092f532efdc2c00e143ce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x596A4 9692 bytes
font_01_sfnt_off0005b190.bin
eabbbea57c9369ba3e06b852489cf9fb59f57940a1fdcb8451b72233effcacf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B190 16396 bytes

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