Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f5da9bc4131a5a…

MALICIOUS

PDF

45.1 KB Authoring application: Inkscape
MD5: be3859546ce81f034847babbcbb0fb23 SHA-1: c0f14cb8e869b9003b976a32741c6ca6f19d7f91 SHA-256: 05f5da9bc4131a5a39d619d9cd3034b42ff9274fd011ea9213494b0f10f4f32c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a link farm, containing a large number of embedded URLs pointing to external PDF files. This technique is often used to artificially inflate search engine rankings or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://topmuscle.ru/uploads/2020/01/27/5444476.pdf
    • http://nonstopinterior.com/uploads/1/3/0/2/130272364/7537655.pdf
    • http://bartoncourtstudios.co.uk/uploads/1/3/0/5/130589431/vovakopi.pdf
    • http://sinijan.kasperplus.ru/uploads/2020/01/28/duzamidilomoviw.pdf
    • http://audiostart36.icu/uploads/2020/01/27/gatalesu.pdf
    • http://trophybearer.org/uploads/1/3/0/3/130313632/geliboxexogot-segexon-zojemobe.pdf
    • http://themagicbroom.net/uploads/1/3/0/5/130539944/3972508.pdf
    • http://dovernewlife.org/uploads/1/3/0/6/130639922/5258549.pdf
    • http://nabajal.org/uploads/1/3/0/4/130435774/dalidumiwinidefedet.pdf
    • http://power101jamz.net/uploads/1/3/0/5/130590658/sivopirul.pdf
    • https://xapizawawejux.weebly.com/uploads/1/3/0/5/130590233/nowabogaviw.pdf
    • http://ilianaroal.com/uploads/1/3/0/6/130604771/28856a507a.pdf
    • http://sapoxov.ib-airbank.mobi/uploads/2020/01/28/bulobapisefufuni.pdf
    • http://mirigubler.com/uploads/1/3/0/5/130589122/9359901.pdf
    • http://lis.aewjasw.icu/uploads/2020/01/27/wakaxopefine.pdf
    • http://gotedavumu.pets-and-co.ru/uploads/2020/01/27/tudigetepogix-xeniludemixavi-widigodojidizar-vofadujoze.pdf
    • http://dirtroaddanes.com/uploads/1/3/0/5/130547405/tuzixisasogu.pdf
    • http://tbspeo.com/uploads/1/3/0/5/130551222/dozijijam.pdf
    • https://nopetinabezapev.weebly.com/uploads/1/3/0/4/130435891/jopuvupo.pdf
    • http://nycartsed.com/uploads/1/3/0/4/130435594/4121288.pdf
    • http://boominworld.com/uploads/1/3/0/4/130435990/5829473fd6c71.pdf
    • http://rayonlifestyle.com/uploads/1/3/0/5/130540146/8caf1d.pdf
    • http://rocathletes.com/uploads/1/3/0/4/130476075/130476075.html#auld+triangle+sheet+music
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015d0.bin
fe93d66a708288c82aea4df54f624ff80d83f0fc910c963e81801bc5a3c6fe44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D0 9492 bytes
font_01_sfnt_off000076e6.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E6 2652 bytes

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