Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa2a925cc239c48…

MALICIOUS

PDF

50.7 KB Created: 2020-04-11 16:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 872bc21d3d2036f7798cbd8d502fefb8 SHA-1: d437e3d45afaaabbb0002c81a601dcc1edef42d4 SHA-256: caa2a925cc239c48b9269912ffca14e5b9990c1097a01154d07a54c2ece5fdaf
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm designed to manipulate search engine results or host malicious content. The document body contains garbled text and some of the extracted URLs, reinforcing the idea that the primary purpose is to redirect users to potentially harmful external sites.

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://laptoprepairsstudio.com/uploads/1/3/0/5/130590770/130590770.html#bugambilias+ddns+net+9090+index
    • http://kaisahuhtaniemi.com/uploads/1/3/0/6/130620435/xededirofewawatabew.pdf
    • http://hephub.net/uploads/1/3/0/5/130588207/bumesisaxot-xilotinusopi-budutidolan.pdf
    • http://liloubella.com/uploads/1/3/1/4/131407315/8734346.pdf
    • http://citizens-medicare.com/uploads/1/3/0/7/130775741/duravakubom-jegupek-fizunenigela.pdf
    • http://mvasileva.com/uploads/1/3/0/7/130776801/64c7777b82.pdf
    • http://queerfemme.com/uploads/1/3/0/5/130590594/lonanilu_zezibopup_logoveg.pdf
    • http://bolderlegal.com/uploads/1/3/0/3/130312952/jufozoledatuxinekasa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000576a.bin
5278024270de67705d3a5034a26ce2f5e1d9e53f50705cc770b2190155f81e7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x576A 6728 bytes
font_01_sfnt_off0000680d.bin
7997471acb9ff3ce2369db4387188440f231fdc9003914b9fe3d5e428344f8f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x680D 9188 bytes
font_02_sfnt_off0000897e.bin
36247e22f6a838ad1a378aa203356277e92e66ec8770c1df16e9f44556452c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x897E 8400 bytes
font_03_sfnt_off0000a33a.bin
b32eb31ea715dd586c8b41db0cd7c98c3258cc9847661bd09f8f60e612961eba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA33A 17832 bytes

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