Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdfb180f10abea39…

MALICIOUS

PDF

39.7 KB Authoring application: LibreOffice
MD5: b5c706b73e5c0607daeae28cfb261cb2 SHA-1: 9fd323546f650cce8ac467618f5f8766f70b27c5 SHA-256: cdfb180f10abea3974558377d0738ac19cccf6a6e5df1154e7989c30e4373957
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. The PDF_SEO_LINK_FARM heuristic indicates the presence of a large number of external links, with imperiya.club being a dominant host. These links likely serve as a lure to direct users to phishing sites or to download further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://imperiya.club/uploads/2020/01/28/6bae466344.pdf
    • http://michelziesecke.com/uploads/1/3/0/4/130476649/daxotakejeramerupex.pdf
    • http://mountzionpbchurch.org/uploads/1/3/0/6/130604430/4189442.pdf
    • http://katrinadasilvaart.com/uploads/1/3/0/5/130551434/c3e0cbed9.pdf
    • http://michelleleblancshortstories.com/uploads/1/3/0/4/130436197/fodolefi_daribaduxefum.pdf
    • http://mactak.center/uploads/2020/01/28/mabijiboneg-naziruwi-xerisikive-fegiluwoli.pdf
    • https://murikuju.weebly.com/uploads/1/3/0/5/130588644/9928099.pdf
    • http://lovejemchughina.fun/uploads/2020/01/28/sisoxebezatanasazor.pdf
    • http://millsupportzuid.com/uploads/1/3/0/3/130379113/544901.pdf
    • http://populair-cyber.com/uploads/2020/01/27/ee14e0a697af397.pdf
    • http://mofouad.com/uploads/1/3/0/6/130621032/00b6d78b5d0c7.pdf
    • http://musetech.site/uploads/1/3/0/5/130590431/vujinedegemijo-beweniv.pdf
    • http://bejustalittlebetter.com/uploads/1/3/0/2/130273962/130273962.html#bitbucket++commit+as+patch

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013a1.bin
832a68ff1c105c6f4dba83f49d73b8957d421b2c4be1e7313a658c5f14a5b947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A1 9156 bytes

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