Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b8a72aa5666da6…

MALICIOUS

PDF

29.0 KB Authoring application: PDFedit
MD5: 362cf099cd3abd1bf23206be1aea78a2 SHA-1: ab4920bfde67ee8c7027d018bfc1f607ab657abb SHA-256: 76b8a72aa5666da692b95d828462c13e7beecc402f942cc58c592b0ea7050430
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as phishing or a downloader. While no scripts were extracted, the sheer volume of external links suggests a campaign to drive traffic to potentially harmful sites.

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://www.remedybeats.com/uploads/1/3/0/6/130604548/bulepeju-lokereli-palebo-xuvijokovijomo.pdf
    • http://synchronyleds.us/uploads/1/3/0/5/130539185/7021264.pdf
    • http://lewisvillepestpros.com/uploads/1/3/0/4/130435570/pazebojavewa.pdf
    • http://athertongardens.com/uploads/1/3/0/6/130621361/dapevaju.pdf
    • http://newhereiam.com/uploads/1/3/0/6/130639471/ronofulisiremuzu.pdf
    • http://tmg23.com/uploads/1/3/0/7/130775917/e143da5bfe21a0.pdf
    • http://www.robsimmonsdesigns.com/uploads/1/3/0/5/130545421/0a92a62.pdf
    • http://clogdancing.tv/uploads/1/3/0/2/130289214/wisenokebema-xuripudelomo-laravorin.pdf
    • http://www.lux-com.com/uploads/1/3/1/0/131070918/ab9c680b.pdf
    • http://graemeburk.com/uploads/1/3/0/6/130622032/tevugikur.pdf
    • http://patriotreport.us/uploads/1/3/0/5/130589126/jarutareseliniw_samanik_xeziguvawuk_xekuwafu.pdf
    • http://smilyface.org/uploads/1/3/0/5/130546923/fe4253f0805.pdf
    • http://trainingcenterchurch.com/uploads/1/3/0/5/130590273/zadesemetolezar.pdf
    • http://millardproductions.com/uploads/1/3/0/7/130776788/391f88d937cd1.pdf
    • http://mta-sts.mx.springmorefarm.com/uploads/1/3/0/6/130621301/lutekolarixof_dafadefuzixof_nuxiretow_tamojewaful.pdf
    • http://thecheckupapp.com/uploads/1/3/0/6/130621890/wuzegevepo.pdf
    • http://lonepeakwoodworkx.com/uploads/1/3/0/6/130604500/130604500.html#bracket+prescription+in+orthodontics+ppt

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001833.bin
f18a29bec07942c852a4d666685604f97c2ce0f425c32ba83902350b1cb9d0ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1833 6664 bytes

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