Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c12875873ad55e…

MALICIOUS

PDF

44.3 KB Authoring application: Nitro PDF
MD5: 4e2116f32118b5afb80119646bf9880b SHA-1: 2c7d62be3d28e51514a808b3547d3a655e057df2 SHA-256: a5c12875873ad55e3ab3b3173880596eccf35fec1b15883939cf4f7408f20f01
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a common technique for SEO poisoning and phishing lures. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' further supports a phishing or traffic redirection intent. The document body, though heavily obfuscated, mentions 'Excel business finance spreadsheet', suggesting a lure to trick users into downloading malicious content.

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://123klart.se/uploads/1/3/0/2/130272478/81fb7f647b7.pdf
    • http://suderve.com/uploads/1/3/0/6/130604552/zesabo.pdf
    • http://priorityrecruitingsolutions.com/uploads/1/3/0/3/130323377/buzesozowasegi-pelenu.pdf
    • http://sidemountainspecialtyfoods.com/uploads/1/3/0/6/130620209/nenosuzuwikeruwo.pdf
    • http://livemusicgozo.com/uploads/1/3/0/5/130545001/97ad9476a7922c.pdf
    • http://complaintagainstprimera.com/uploads/1/3/0/7/130740232/2713013a15.pdf
    • http://stresswiseatwork.com/uploads/1/3/0/2/130271090/d4e0fcd11fa8f.pdf
    • http://dancinggoatsanctuary.com/uploads/1/3/0/7/130739853/130739853.html#excel+business+finance+spreadsheet

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001188.bin
2648e77ae45e11dc13674a1d0e9be3c5e9b1e55944d9b1c72a0280bf4bd79c15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1188 8804 bytes
font_01_sfnt_off00006614.bin
d12e1945699adc080c3e2f49a2c45ee9a70cbb178c18d882f92367fcd923f800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6614 16396 bytes

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