Malicious PDF — malware analysis report

Static analysis result for SHA-256 5866747e91025dc8…

MALICIOUS

PDF

34.6 KB Authoring application: Nitro PDF
MD5: 2bb35d3b94c9850ca0f33f31281b5333 SHA-1: 2bed76a27e6f55ffc3ebd8f9d46e02bce3c17ab8 SHA-256: 5866747e91025dc8c5b733e5b830e81bd2625b83850072f2f2d4a185d915be96
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links to external PDF documents, a technique commonly used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are likely part of a link farm designed to lure users to malicious content or phishing 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://caddelite.ca/uploads/1/3/0/3/130313319/judazuwulalirizukafu.pdf
    • http://platuworlds2017.com/uploads/1/3/0/6/130639307/tafininew_julujotanezakuw.pdf
    • http://wearejanedoe.com/uploads/1/3/0/5/130540592/rixememabivoz.pdf
    • http://www.examiningkennan.com/uploads/1/3/0/4/130436236/1e526848dd809a.pdf
    • http://bakersman.ca/uploads/1/3/0/3/130379422/2197392.pdf
    • http://michelleveixmccartan.com/uploads/1/3/0/5/130540077/kevukebogira.pdf
    • http://ourlittleflowers.com/uploads/1/3/0/4/130494743/fivuparorojo.pdf
    • http://www.fishytushy.net/uploads/1/3/0/7/130740123/rikafajek_nobigo_texegajowime.pdf
    • http://thoughtgumbo.info/uploads/1/3/0/2/130270963/3011266.pdf
    • http://www.oblates-osb.org/uploads/1/3/0/6/130620348/8757d.pdf
    • http://candfbonding.com/uploads/1/3/0/6/130621185/nipilasuk_rigokuzufo_fexamitirop.pdf
    • http://beseecherllc.com/uploads/1/3/0/4/130483753/bematiler-zozazupa.pdf
    • http://ajochinger.org/uploads/1/3/0/5/130546333/d6f32607cd79172.pdf
    • http://www.lazydaysbb.biz/uploads/1/3/0/4/130493476/130493476.html#radial+styloid+tenosynovitis+de+quervain+treatment

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ec9.bin
3f55a140bd7484df9a934aa4cbf19b538add9fe90a8258700e22316ddb3faf29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC9 7628 bytes

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