Malicious PDF — malware analysis report

Static analysis result for SHA-256 71460ac1e8485f51…

MALICIOUS

PDF

40.0 KB Authoring application: PDF Studio
MD5: 6dad6bb346ec8a1a2f3a2d8962a9fb5c SHA-1: 8f50f535b9068e923cb483b3c5af7cde6aba9f59 SHA-256: 71460ac1e8485f512eb252962baccf17a83352380cf471987bf228f2e8588762
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure related to tax returns, directing users to a URL that hosts a PDF file. This secondary PDF contains a link farm, suggesting a phishing or SEO poisoning campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing further malware or phishing 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://bellanetfiber.net/uploads/1/3/0/4/130436224/kemutilajesoki-majisal-taliwemuraju.pdf
    • https://vogotevuju.weebly.com/uploads/1/3/0/5/130589239/e5af12cc3b535.pdf
    • http://refreshtoimpress.com/uploads/1/3/0/6/130621212/111354.pdf
    • http://nutricionbasadaentrofologia.com/uploads/1/3/0/2/130287457/wizemoseduxezalopola.pdf
    • http://beltranonsite.com/uploads/1/3/0/5/130540077/vutubamaxoz.pdf
    • http://museandreign.com/uploads/1/3/0/6/130605229/b4137.pdf
    • http://vinculumartfinance.com/uploads/1/3/0/5/130545199/mixezananozafuke.pdf
    • http://kelseyelizabethphoto.com/uploads/1/3/0/6/130620951/kubegirumab.pdf
    • http://baliji.newneonaslimm.com/uploads/2020/01/28/4394149.pdf
    • http://mrmacbiblebook2.com/uploads/1/3/0/5/130588509/130588509.html#excess+reportable+income+dividend+tax+return

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001288.bin
49ca32cc7534052fc56fd3dd68e0d243247ce949c9f135a04bb661b4ab47ec09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1288 8584 bytes

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