Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ffbd5d9ccff731…

MALICIOUS

PDF

35.0 KB Authoring application: Nitro PDF
MD5: d475291e9d9782df94813b0c58364ce7 SHA-1: 5ed993718c3a31aa791c93e9eb356a4639b8832c SHA-256: 67ffbd5d9ccff7319c866f1d127a79247b5d21c234443ea46996d7bd20d32078
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flagged this file as malicious. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://russopublicrelations.com/uploads/1/3/0/7/130775842/4247605.pdf
    • http://mx.illuminationcinema.com/uploads/1/3/0/5/130588256/9485979.pdf
    • http://arbitech.space/uploads/1/3/0/2/130271167/fenolunodav.pdf
    • http://dragonsoul.help/uploads/1/3/0/5/130546457/619a82cbadd.pdf
    • http://clikresume.com/uploads/1/3/0/6/130639821/bfb2c65d4676.pdf
    • http://blokcr.com/uploads/1/3/0/4/130476082/e41e7130a85.pdf
    • http://rhonddaladieshockey.co.uk/uploads/1/3/0/7/130775813/ziwamebeguzafew_zemasoxe.pdf
    • http://simply-sarah.co.uk/uploads/1/3/0/7/130775197/ribopateva.pdf
    • http://priscaspiggies.com/uploads/1/3/0/7/130739490/nopinoruwe.pdf
    • http://southerncrossairforce.com/uploads/1/3/0/3/130313613/disazadezukivanez.pdf
    • http://ctanujit.com/uploads/1/3/0/7/130739697/5e62d18bb34d.pdf
    • http://mail.velchavelchev.com/uploads/1/3/0/2/130289271/130289271.html#difference+between+spinal+block+and+epidural+uk

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000329d.bin
8c113041d6fbe11e47cb01a5f1400941eae6461a2149e432c22af07160593c88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x329D 7636 bytes

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