Malicious PDF — malware analysis report

Static analysis result for SHA-256 821455b9a2f74b0c…

MALICIOUS

PDF

57.7 KB Authoring application: PDFBox First seen: 2020-09-24
MD5: 75266d786e6ee00fb3e573018038983e SHA-1: 4c48642a9fcea12ec3378e80e9043b69931729a5 SHA-256: 821455b9a2f74b0c0de7c265e9001e768e22ac5ef55cd63b7b92c3f7c356fe02
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.TtraffRobotInstall-7605656-0'. The document body, though truncated and containing obfuscated text, mentions 'Compound interest formula', potentially as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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.
  • 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://bushelandbasket.com/uploads/1/3/0/7/130776526/kazoluvigemuge_xaxaruvamivorit_jitufijunufana_fegabebutukog.pdf In PDF document text
    • http://mollybalesfranco.com/uploads/1/3/0/7/130775674/6597cb74313b80.pdfIn PDF document text
    • http://antconsultationrooms.com/uploads/1/3/0/8/130813714/8a0acb4918f.pdfIn PDF document text
    • http://creativechecklist.com/uploads/1/3/0/6/130622063/9694573.pdfIn PDF document text
    • http://74-123-72-44.mgwnet.com/uploads/1/3/0/7/130776065/suxapegapivomeg.pdfIn PDF document text
    • http://cleanwatergso.net/uploads/1/3/0/4/130483266/8983565.pdfIn PDF document text
    • http://modelamics.com/uploads/1/3/0/7/130775940/radibiva.pdfIn PDF document text
    • http://domesticgoddessish.com/uploads/1/3/0/6/130621938/pazezasudixod.pdfIn PDF document text
    • http://quarterbackdevelopment.com/uploads/1/3/0/6/130621063/vezufibij.pdfIn PDF document text
    • http://devweb.org/uploads/1/3/0/5/130589316/5216245.pdfIn PDF document text
    • http://bradhip.com/uploads/1/3/0/5/130588201/9778528.pdfIn PDF document text
    • http://nelslehtinen.com/uploads/1/3/0/3/130313230/wevudovobalujivo.pdfIn PDF document text
    • http://www.jessicateachesenglish.com/uploads/1/3/0/5/130539408/rogidisupanuxudebo.pdfIn PDF document text
    • http://ds4you.tech/uploads/1/3/0/5/130551144/6968512.pdfIn PDF document text
    • http://wallwalkers2015.com/uploads/1/3/0/5/130589348/gefejodudakik.pdfIn PDF document text
    • http://athead.com/uploads/1/3/0/4/130435721/be1bf784d660.pdfIn PDF document text
    • http://triosdigital.com/uploads/1/3/0/2/130287988/fozam.pdfIn PDF document text
    • http://developmentechnwkllc.com/uploads/1/3/0/4/130436271/5880283.pdfIn PDF document text
    • http://mscalvin.com/uploads/1/3/0/4/130436125/8986623.pdfIn PDF document text
    • http://erkigroup.com/uploads/1/3/0/6/130605194/9e73d460e6.pdfIn PDF document text
    • http://klokkeraadgivning.com/uploads/1/3/0/6/130640091/130640091.html#compound+interest+formula+for+monthly+installmentsIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF0 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
font_01_sfnt_off0000702b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702B 3340 bytes
SHA-256: abb1618c542dcc3ba193c826f0f608f14612ed9505979247687ada39e892b246
font_02_sfnt_off00007e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9F 9504 bytes
SHA-256: ade0a6bcaef4938d2961a91b5dad0f70f04026359b86da947c79518f4b7683e4

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