Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d40f899627c8a83…

MALICIOUS

PDF

38.7 KB Authoring application: Pdftk
MD5: a7fb4182fbc9b2823eee45486a84a744 SHA-1: e9ff094937dda5df1960f13472277aa5ab93dd10 SHA-256: 8d40f899627c8a8309b2971918233d664c3cdd88d8b38c62fd1fff6065fc5a23
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary attack pattern involves a link farm hosted on multiple domains, directing users to further PDF content.

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://mafi.vip/uploads/1/3/0/2/130272853/814878.pdf
    • http://mypopularfood.com/uploads/1/3/0/2/130289227/0a7c330b8a4b5.pdf
    • http://upfh.com/uploads/1/3/0/5/130551239/wuzizamutula.pdf
    • http://aquase.net/uploads/1/3/0/6/130639836/86874c8fa45388.pdf
    • http://stumblinggoatbeercompany.com/uploads/1/3/0/8/130813369/beboju.pdf
    • http://dollarmovement.com/uploads/1/3/0/8/130874212/pavezowot.pdf
    • http://bluecalliope.com/uploads/1/3/0/4/130435667/48b13a.pdf
    • http://redmethod.net/uploads/1/3/0/6/130605230/fajamuputuxog.pdf
    • http://justsweetlovela.com/uploads/1/3/0/3/130323266/vitomidisomidob_gunefetuxax.pdf
    • http://bestsellersdeal.nl/uploads/1/3/0/5/130543494/mukezos-nexabevofirep-favugagux-zenuze.pdf
    • http://sfsparkscheerleading.com/uploads/1/3/0/6/130621507/bitar.pdf
    • http://cablesnares.com/uploads/1/3/0/3/130312920/5f49e7b.pdf
    • http://charjo.com/uploads/1/3/0/5/130539215/1207542.pdf
    • http://carbuzzznproductions.com.au/uploads/1/3/0/8/130874124/c5f2a49786c466.pdf
    • http://funeralderangements.com/uploads/1/3/0/2/130274355/koxoni.pdf
    • http://xiaoyouqipaixiazai.br3h.com/uploads/1/3/0/6/130620679/130620679.html#avian+influenza+virus+in+poultry
    • http://mypopularfood.com/up

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c12.bin
9a855e94a2823be35e54634cd90abf4ee6f57d42511c07e23d2532d2b3e0b158		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C12 8280 bytes

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