Malicious PDF — malware analysis report

Static analysis result for SHA-256 51081e1144a2d845…

MALICIOUS

PDF

44.7 KB Authoring application: Solid Converter PDF
MD5: 863c347a688074547dd803e286da06c5 SHA-1: d6642bdd160d88cf701661461df5067c48eeaca6 SHA-256: 51081e1144a2d8453e37690743660b697e0f214c200d67d2f82f4dbfc4350e44
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to other PDF files on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic and ClamAV detection. The embedded URLs are the primary indicators of compromise.

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://ashonfood.com/uploads/1/3/0/5/130589007/6688059.pdf
    • http://cottonginmuseum.org/uploads/1/3/0/3/130379182/fce2f7.pdf
    • http://aikosilkart.net/uploads/1/3/0/2/130288406/kejesatawa.pdf
    • http://vixenpromakeup.com/uploads/1/3/0/6/130639753/xexut.pdf
    • http://optimalhospicefoundation.org/uploads/1/3/0/6/130621938/8468275.pdf
    • http://gev.applemann.ru/uploads/2020/01/28/7748227.pdf
    • http://drivenwildmn.com/uploads/1/3/0/5/130551211/semolub_fiselimodiz.pdf
    • http://mobiledesigntechnology.com/uploads/1/3/0/7/130776523/7065187.pdf
    • https://gomusawuk.weebly.com/uploads/1/3/0/6/130604222/9ad7e6.pdf
    • http://kreativekidsworld.com/uploads/1/3/0/6/130620657/130620657.html#the+arabian+nights+richard+burton

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000122c.bin
2f2d5945f9136df2845b38624c83376999b9baa678eb648c8b6308429c134180		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122C 8788 bytes

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