Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5064eb8fce88df…

MALICIOUS

PDF

39.1 KB Authoring application: QPDF
MD5: bf935636b66455e16920a3e66415ad93 SHA-1: 41bf881f2332da2e162f5330c5ef2bd6f4da4a43 SHA-256: 5c5064eb8fce88df14ae8b497038578571b43ab9a7cefe09e0cd8fef63eacf57
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with multiple external URLs, a common tactic for distributing malware or phishing content. The heuristic 'PDF_SEO_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly indicate malicious intent. The document body and embedded artifacts do not contain executable scripts, but the overall structure and embedded URLs point to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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
  • Document signing service impersonation lure medium SE_DOCUSIGN_LURE
    Document impersonates DocuSign, Adobe Sign, or a similar signing service in a signing-request context
  • 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://like-pi.net/uploads/1/3/0/4/130483286/7843763.pdf
    • http://mykayscreations.com/uploads/1/3/0/5/130543310/9d0fc725.pdf
    • http://mudgleyholidayhouse.com/uploads/1/3/0/6/130605291/zumaxivupik-tozinuxe-rubenor.pdf
    • http://misssoutheastpageantry.us/uploads/1/3/0/5/130543156/130543156.html#barcode4j.+jar+free

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001013.bin
97e375df1ca8858392010b19fe25df588491b195611d14ab6b97652feeacf3a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1013 8984 bytes

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