Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d03624238bbd3d5…

MALICIOUS

PDF

48.6 KB Authoring application: Pdftk
MD5: 77628e54280d35e545b2d70f1c5b8199 SHA-1: 6e9704e23abbbe849c3a35884bebd3224e5da49c SHA-256: 6d03624238bbd3d552fef8d28141e6a6d8b84170084d6030a5406682d47f2214
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 poisoning or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to potentially harmful 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://merakidestinationmanagement.com/uploads/1/3/0/4/130476652/fexiwuso.pdf
    • http://reneegdesigns.com/uploads/1/3/0/2/130289400/revesamoxati_porufin_gitoto_kesiro.pdf
    • http://centralbrowardtransitstudymeeting.com/uploads/1/3/0/5/130589128/9163992.pdf
    • http://nago.the-future-company.com/uploads/2020/01/27/5e001fe81f4426e.pdf
    • http://makevotingmatter.net/uploads/1/3/0/2/130288962/1195306.pdf
    • http://hidefdjs.com/uploads/1/3/0/3/130313471/winesuj.pdf
    • https://dajejapukade.weebly.com/uploads/1/3/0/5/130589416/8999231.pdf
    • http://modernbyken.com/uploads/1/3/0/4/130476798/wugupedor-xufogok.pdf
    • http://cancercoloring.com/uploads/1/3/0/5/130539940/980063.pdf
    • http://mybima.net/uploads/1/3/0/5/130551399/1c3279d.pdf
    • http://archivetradingcompany.com/uploads/1/3/0/4/130483739/rakomudikezo.pdf
    • http://dancinggoatsanctuary.com/uploads/1/3/0/6/130620937/130620937.html#typhoid+fever+treatment+in+ayurveda+medicine
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012ed.bin
e1a06aaf7bfd19ab9e0e55ff7dda5c56f4ef55ece8b5e2f4b3e9330afaca58c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED 8820 bytes
font_01_sfnt_off00007738.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7738 16204 bytes

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