Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b8e25f895162111…

MALICIOUS

PDF

35.9 KB Created: 2020-06-04 20:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5744bd8dfca659a95de17c3e0e130bf7 SHA-1: 571547ab19c2e41d6ba77462cf030abfe2f694e1 SHA-256: 3b8e25f895162111acca565c0b641120017e6d4d31a5ef9930e008dab4099318
62 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body also contains references to 'Scansnap manual ix500', suggesting a lure to disguise the malicious intent. The primary purpose appears to be directing users to a network of SEO-optimized PDF files, likely for malicious purposes such as phishing or malware distribution.

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://brittso.com/uploads/1/3/0/5/130539428/130539428.html#scansnap+manual+ix500
    • http://activekidzyoga.com/uploads/1/3/0/6/130621575/c41216.pdf
    • http://bonkersbobbins.com/uploads/1/3/1/3/131379830/vimobokizafel_tenubum.pdf
    • http://thesquarehippie.com/uploads/1/3/1/4/131453527/16990.pdf
    • http://tranquiloasis.net/uploads/1/3/1/4/131437253/xabeloxima.pdf
    • http://whatscoolit.com/uploads/1/3/0/7/130738727/juluber.pdf
    • http://brittso.com/uploads/1/3/0/5/130539428/terms.html
    • http://brittso.com/uploads/1/3/0/5/130539428/dmca.html
    • http://brittso.com/uploads/1/3/0/5/130539428/policy.html
    • https://sekejodi.files.wordpress.com/2020/06/sireraxojubinozusexi.pdf
    • https://barurulu.files.wordpress.com/2020/06/zusixudegepakove.pdf
    • https://vexekube.files.wordpress.com/2020/06/73583662900.pdf
    • https://rowejarenak237226416.files.wordpress.com/2020/06/juxere.pdf
    • https://kesodisak.files.wordpress.com/2020/06/bajowol.pdf
    • https://bakovuder.files.wordpress.com/2020/06/82044551536.pdf
    • https://rilamexix970799637.files.wordpress.com/2020/06/neral.pdf
    • https://runudasolug.files.wordpress.com/2020/06/90475005081.pdf
    • https://nugipudu.files.wordpress.com/2020/06/81118913690.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006370.bin
810c432720477420bf8bc0828f5b53b48b049e6396ebd306f3c0616e29ad5a91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6370 9524 bytes

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