Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa85320f43674b8…

MALICIOUS

PDF

34.9 KB Authoring application: Nitro PDF
MD5: d80a164123cafab8e1c50ce4772f6b05 SHA-1: 081dbaa60c80c08c0231b85196acb96590febae2 SHA-256: 3fa85320f43674b8cb86761ac5004286bd72cfb37cfd163fd23eeb7f0805331a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded URLs pointing to other PDF files hosted on various domains. This 'link farm' technique is commonly used to distribute malicious content or redirect users to phishing sites. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the 'PDF_SEO_LINK_FARM' heuristic strongly indicate a phishing or traffic redirection scheme.

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://lomaxcontractors.com/uploads/1/3/0/7/130740572/f5282f83e09ca3.pdf
    • http://laurabeardart.net/uploads/1/3/0/3/130312914/86669.pdf
    • http://ladyandthegeek.net/uploads/1/3/0/8/130874646/nagovarivuporirifo.pdf
    • http://jobcentreguide.net/uploads/1/3/0/6/130604805/45f85d8f76eb08c.pdf
    • http://lottomagico.com/uploads/1/3/0/4/130491932/6224373.pdf
    • http://ncbeertours.com/uploads/1/3/0/3/130379959/2599599.pdf
    • http://cristalbay.com/uploads/1/3/0/7/130775758/820ee8d5dcfd6.pdf
    • http://stihi.info/uploads/1/3/0/7/130776674/fipupofivedaken.pdf
    • http://awazetour.com/uploads/1/3/0/6/130639412/8366507.pdf
    • http://sckatelynham.com/uploads/1/3/0/5/130590399/9d0a861beb.pdf
    • http://callumworsnop.com/uploads/1/3/0/5/130545480/takovodamipebi.pdf
    • http://thesketchytherapist.com/uploads/1/3/0/3/130324065/rakifedo-nedobawora.pdf
    • http://adentabenelux.com/uploads/1/3/0/5/130543158/takimunali-denitufap-dipefev-lalozilevemer.pdf
    • http://bandonplayhouse.com/uploads/1/3/0/8/130874519/9498261.pdf
    • http://briankhorsand.com/uploads/1/3/0/2/130271078/kisujalil.pdf
    • http://kittenconvict.com/uploads/1/3/0/6/130604685/2b3ae.pdf
    • http://ottawarealtypa.ca/uploads/1/3/0/4/130483509/burezetuzaxaxuxerer.pdf
    • http://casenoibucuresti.com/uploads/1/3/0/7/130739897/fewowokowezoz-bugor-jemavojiga.pdf
    • http://dearsilas.com/uploads/1/3/0/5/130545666/rulalufikasupeg.pdf
    • http://wangshangqipaiyouxizhuanqian.br3h.com/uploads/1/3/0/6/130639308/130639308.html#what+is+main+difference+between+plant+cell+and+animal+cell

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a7e.bin
c95fb4fb32822fee0deb9141166be0067db4cc07fda52e7d1866546cce0ce5be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A7E 7612 bytes

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