Malicious PDF — malware analysis report

Static analysis result for SHA-256 47265712baef35fa…

MALICIOUS

PDF

40.5 KB Authoring application: Soda PDF
MD5: 9a3c74ce8bac3c7fec5e2793462e4caa SHA-1: d851e41c0a466e7ddd3db8849189d348c4bad07e SHA-256: 47265712baef35faa7d4baa91bd1b09c82cec9b3cc6698024c2ea3237a4384e9
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier output strongly suggest malicious intent, likely phishing or traffic redirection. The document body, despite being partially corrupted, mentions 'First grade math worksheets counting on' which appears to be a lure to disguise the malicious link farm. No scripts were extracted from this sample.

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://mountaintownplanners.org/uploads/1/3/0/4/130436079/514320.pdf
    • http://vixaba.avtotool.ru/uploads/2020/01/29/fijawulegisi.pdf
    • http://moayas.com/uploads/1/3/0/4/130476538/7617776.pdf
    • http://faithworks4us.com/uploads/1/3/0/6/130604980/e02b9.pdf
    • http://inceptionsdesign.net/uploads/1/3/0/6/130604466/voputaturirefe.pdf
    • http://beautychairs.ch/uploads/1/3/0/6/130604681/9760731.pdf
    • http://brokenglass.website/uploads/1/3/0/6/130604903/4895381.pdf
    • http://nspiresalonatx.com/uploads/1/3/0/3/130323260/towal_ririgutoko_bubadixim_lumozorokebu.pdf
    • http://trentriverdesigns.com/uploads/1/3/0/4/130435986/130435986.html#first+grade+math+worksheets+counting+on

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011e4.bin
212b045097823578bc8c62b38a716b279857cce760097711b9ac28d874665607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4 8700 bytes

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