Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23e77a318c9295c…

MALICIOUS

PDF

45.9 KB Authoring application: PDFBox
MD5: 32da0dcbe5fa0f703d8a8d88786b141f SHA-1: 03de840684d258f7b29d4ccca965626e1ead3f1b SHA-256: d23e77a318c9295ca04e48ccb570994c04b3855f934082857994f5e48f2964c6
150 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a large number of embedded URLs pointing to external PDF documents, a technique often used for SEO manipulation or to distribute malware. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted from this sample, but the heuristic 'PDF_SEO_LINK_FARM' suggests a content-delivery or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://songrise.net/uploads/1/3/0/7/130775092/segifa.pdf
    • http://www.cavalierahomes.com/uploads/1/3/0/2/130273978/23588ccee2e91ce.pdf
    • http://candacegraham.com/uploads/1/3/0/5/130588494/7b807aa3d8.pdf
    • http://quizzzila.com/uploads/1/3/0/2/130272394/2088539.pdf
    • http://dianaburan.com/uploads/1/3/0/5/130543156/bigadalek.pdf
    • http://u-ehs.com/uploads/1/3/0/6/130621413/4694333.pdf
    • http://www.bayareasmiledental.com/uploads/1/3/0/2/130289305/fogezukokekevube.pdf
    • http://siloambaptist-church.org/uploads/1/3/0/5/130540214/85799743f8fec79.pdf
    • http://lambertservisi.com/uploads/1/3/0/5/130545484/pijatuwalojozimo.pdf
    • http://sostenibilidaddelmenor.com/uploads/1/3/0/5/130589195/e48a9b6cadae383.pdf
    • http://ormansite.com/uploads/1/3/0/6/130640126/boxuremubesoza_romojozopizemi_lotowopaloje_vejimokevow.pdf
    • http://www.peterweiden.com/uploads/1/3/0/2/130289428/130289428.html#severe+pneumonia+in+pediatrics+ppt

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cf5.bin
41e8d9d72bd59985de5b179c4041d996c066f3dd36bfcea70abe5976a31ae8ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF5 8124 bytes

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