Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf81bb2a84cc645…

MALICIOUS

PDF

36.9 KB Authoring application: Nitro PDF
MD5: 2ab6ccd0b2e7f8534061a66e0ee45d44 SHA-1: 29dd0754169869f161765cc656a3360a9106f259 SHA-256: 7cf81bb2a84cc64579e7ba97d226ce87e4b57710d7826fa028a5dc0f6e73a880
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique commonly used in SEO poisoning and phishing campaigns to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body is heavily obfuscated and does not provide clear textual lures, but the sheer volume of linked PDFs suggests a coordinated effort to distribute malicious 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://sugartreesoda.com/uploads/1/3/0/4/130483980/xikidaju-nudevita.pdf
    • http://thehalos.com/uploads/1/3/0/7/130739076/fobokubilox_pojuvisozolos_xuxidojiw.pdf
    • http://www.dj4rain.com/uploads/1/3/0/2/130272232/8480272.pdf
    • http://wireless-stop.com/uploads/1/3/0/5/130538842/e350bf9f2b518.pdf
    • http://bluesheeppainting.com/uploads/1/3/0/5/130546118/4518540.pdf
    • http://shanghaigourmet.us/uploads/1/3/0/5/130541443/sipemukojow.pdf
    • http://shrutiformoco.com/uploads/1/3/0/8/130873863/09d4e98923ae.pdf
    • http://www.eserveway.com/uploads/1/3/0/7/130740617/9228204.pdf
    • http://floydfx.com/uploads/1/3/0/5/130588443/bupebuda-tafel-xilawoz-varav.pdf
    • http://trainingcenterchurches.com/uploads/1/3/0/6/130621666/c540ecb.pdf
    • http://www.collectivechicago.com/uploads/1/3/0/6/130640090/vakevu-vebapukulunimo-mekewa.pdf
    • http://www.ezbcbd.com/uploads/1/3/0/6/130603690/vetotojisozixupetif.pdf
    • http://marchettispaghetti.com/uploads/1/3/0/5/130538945/4933344.pdf
    • http://cumbriachoralinitiative.org/uploads/1/3/0/4/130488328/3194591.pdf
    • http://californiaspac.com/uploads/1/3/0/5/130539113/1137098.pdf
    • http://roosterpr.agency/uploads/1/3/0/3/130379921/sajunax.pdf
    • http://beatzbylex.com/uploads/1/3/0/4/130488417/2c72ed9633.pdf
    • http://rqgenesis.co/uploads/1/3/0/4/130489914/makunudemosolosek.pdf
    • http://wcd-7904t1u.mgh-r.ch/uploads/1/3/0/6/130605012/130605012.html#rumen+physiology+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000343b.bin
35ff8be33d0747de67e1ac7406280daae9cad8f2ccad5977bddb04be22ad2d24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x343B 7352 bytes

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