Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfb8ed3736df62de…

MALICIOUS

PDF

38.2 KB Authoring application: pstoedit
MD5: 36346790de9c8eecac5269357837cb16 SHA-1: ec6574e472e4144c3224673afe919079a4f458db SHA-256: cfb8ed3736df62dea54c6462d3e8d1b9cf4d6ac683e7d456cabd36dbca92a6e0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded URLs pointing to other PDF files, a technique commonly used for SEO poisoning or to distribute malicious content. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The document body itself contains a mix of seemingly benign text and the list of URLs, reinforcing the lure aspect.

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://norwichmonument.com/uploads/1/3/0/4/130475997/jozemudufi-retanu-dodosozu-moganegum.pdf
    • http://mugudagoji.nickel-access.com/uploads/2020/01/28/1813155.pdf
    • http://callihanenglish.com/uploads/1/3/0/6/130639683/616b8.pdf
    • http://bipa.massrage.ru/uploads/2020/01/27/sowabemezuzope.pdf
    • http://mypinktoys.com/uploads/1/3/0/5/130543980/ditademixuror-rozezopugod-ralinulelurebif-figapupekatasu.pdf
    • http://northwestembroidery.net/uploads/1/3/0/4/130483540/nixunobewo-newazubesob.pdf
    • http://resolien.com/uploads/1/3/0/3/130323162/fojivegovupop-bimasobelesi-nijurik-rative.pdf
    • http://brookeyburnsweebly.com/uploads/1/3/0/5/130543684/7555858.pdf
    • https://gizofunevisen.weebly.com/uploads/1/3/0/3/130313156/bujile.pdf
    • http://northshoreconstructionchriskanter.com/uploads/1/3/0/5/130588721/tegul.pdf
    • http://matotales.letstakemetoad.com/uploads/2020/01/28/numofole-fexani.pdf
    • http://ashevillegreenworks.com/uploads/1/3/0/3/130323465/700e9575.pdf
    • https://toxofumumoxuf.weebly.com/uploads/1/3/0/3/130323888/gotigomesire-gobek.pdf
    • http://pavaxip.dom-gleden.icu/uploads/2020/01/28/gurolej_resiz_jusupaj.pdf
    • http://josipufi.zarokol.top/uploads/2020/01/28/2306490.pdf
    • https://woluvenox.weebly.com/uploads/1/3/0/2/130271211/dakuputowanebo_wupirixomife_zawad_kevozunamitagoj.pdf
    • http://bofugore.nalegke.pro/uploads/2020/01/28/ruxetuxir_suxekubigese_pugodugorajeb_xekepomij.pdf
    • http://nobuhotelmarbella.devsite-1.com/uploads/1/3/0/6/130621141/130621141.html#genetics+monohybrid+crosses+worksheet

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000015d0.bin
b0ddb0f8b40c4cc86baa84ae8107e60f9c95eb8ce5becca90c874635d90086dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D0 8108 bytes

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