Malicious PDF — malware analysis report

Static analysis result for SHA-256 b481d62fa1c5676c…

MALICIOUS

PDF

39.7 KB Authoring application: Solid Converter PDF
MD5: a24d2db728197dd15c832629f68d59e1 SHA-1: fddf3e77c0a03d6f151235bad32edcd6be20e0fb SHA-256: b481d62fa1c5676c3b257c52c9903e14607e40d5e6f06960cbe80b6320d7ad7d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links to external PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly suggest malicious intent, likely related to phishing or traffic redirection. 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://computechinfosolutions.com/uploads/1/3/0/5/130551512/1c9c252ce233.pdf
    • http://poko.chat/uploads/1/3/0/4/130476594/juzidekizud.pdf
    • http://miss-stevens.com/uploads/1/3/0/5/130589156/kumilakozokozuwo.pdf
    • http://coffsharbourroofing.com/uploads/1/3/0/6/130604273/movumolizex-rupananivipaz-fabijo-bupotemizirifuz.pdf
    • http://coalitionagainsthumantrafficking-northernaz.org/uploads/1/3/0/6/130639770/3942239.pdf
    • http://missoulaimports.net/uploads/1/3/0/4/130490378/858759.pdf
    • http://albemarleop.com/uploads/1/3/0/3/130313470/35ac8.pdf
    • http://cahindia.com/uploads/1/3/0/5/130588396/gozesiwodinitulutat.pdf
    • http://nickyarthur.com.au/uploads/1/3/0/2/130289679/9577969.pdf
    • http://asiasoft.com.sg/uploads/1/3/0/6/130639945/bawajokar-fokugerasaj.pdf
    • http://lightingdesignlab.net/uploads/1/3/0/5/130540493/3816094.pdf
    • http://mercyscleaningservices.com/uploads/1/3/0/6/130621741/25242caf42.pdf
    • http://north-carolina-charlotte-real-estate.com/uploads/1/3/0/7/130776043/nibuv.pdf
    • http://bensonderks.com/uploads/1/3/0/6/130604646/muperorokereju_zefuxo_timeketebefede.pdf
    • http://beeclubsales.net/uploads/1/3/0/6/130639721/xokutifiso_madisivuxogik.pdf
    • http://imprentaonlinebarcelona.cat/uploads/1/3/0/7/130740298/5196228.pdf
    • http://mal-test.com/uploads/1/3/0/2/130272905/2542088.pdf
    • http://salesforceguru.com/uploads/1/3/0/4/130478602/5033276.pdf
    • http://natashamoustasha.com/uploads/1/3/0/5/130551586/7956df0.pdf
    • http://carmelorganizer.com/uploads/1/3/0/3/130313363/wevodexedorolufafo.pdf
    • http://spintosouza.com/uploads/1/3/0/4/130483205/980c602aba6f8c.pdf
    • http://colddiamnd.com/uploads/1/3/0/5/130539763/130539763.html#working+principle+of+ac+generator+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c85.bin
ca39a3f5bd7b8de15e357b7ffe397eb8feb096f34cd58f5dcc09ba2a01d73858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C85 7284 bytes

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