Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac73fcf8243672ef…

MALICIOUS

PDF

28.9 KB Authoring application: pdf-parser
MD5: 871eb3c4b570caf8c775c4a7d1778f42 SHA-1: 0ce3bbbf5cd9003b048b202e90bceee83be523a6 SHA-256: ac73fcf8243672ef7ba3ff20473dd1ecd232eca95cc5bbbf009a46e5baedf867
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a coordinated effort to manipulate search engine results or distribute malicious content. The ClamAV detection further supports the malicious nature of the file. No scripts were extracted from this sample, so the attack pattern is inferred from the link farm and the ClamAV signature.

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://cakeinaboxco.com/uploads/1/3/0/6/130621840/2aa7b3a01.pdf
    • http://caitlinmorrison.com/uploads/1/3/0/4/130476146/vabokelesevuli-xotegajev-tavesenati-dilevigewegu.pdf
    • http://12stonesmoldcleaning.com/uploads/1/3/0/4/130488578/38f042f.pdf
    • http://mylittleteethers.com/uploads/1/3/0/6/130640010/sapol-parudova.pdf
    • http://buddha-quotes.org/uploads/1/3/0/4/130490221/1ef1f5a118.pdf
    • http://sabyhage.se/uploads/1/3/0/5/130544034/9903315.pdf
    • http://stokesed508webpage.com/uploads/1/3/0/7/130775211/130775211.html#multinomial+logit+with+random+effects+in+r

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010db.bin
681320980f3950601d29482783a67ac68c48ba3b8d8287096d0caa83d2b925ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB 7356 bytes

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