Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d81fc71081f8f27…

MALICIOUS

PDF

34.0 KB Authoring application: Solid Converter PDF
MD5: 4edf2bc842d280699014b90915442ca2 SHA-1: 6a71e10fd7543c59c26ef99de4e50fef013fc5f1 SHA-256: 4d81fc71081f8f27ae8887130fe30491ace11da604fe4278d99e1a7ae9796eb0
120 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a phishing or SEO spam campaign. The embedded URLs point to other PDF files or an HTML page, likely intended to redirect the user to malicious content. The ClamAV detection further supports the malicious nature of the file.

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://mochaloops.com/uploads/1/3/0/6/130621082/gojajekiw.pdf
    • http://7sevensteps.com/uploads/1/3/0/4/130483959/734a059.pdf
    • http://nolu.sumeza.ru/uploads/2020/01/28/koburuvi_vararuzagupij.pdf
    • http://drpatty.net/uploads/1/3/0/8/130813898/130813898.html#zelda+ocarina+of+time+walkthrough+dodongo%27s+cavern+part+2

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000ffb.bin
b1a2356c3e9a197bfdd2d5e81e5747db9c39e6ff7ab6048645eeaf950aa6dd7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB 8400 bytes

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