Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bfcaf06ae0d1ca6…

MALICIOUS

PDF

56.8 KB Authoring application: Pdftk
MD5: 34eaf9c237dd4ea48e03b4369862bb4d SHA-1: 09ce1b2ef2af7a5df05934d66d9672d4c1a1548c SHA-256: 3bfcaf06ae0d1ca66775d61d66c0be1c9989df340fb3338a088511d91b82cdea
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded URLs pointing to other PDF files, indicating a link farm or redirection scheme. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' confirms the presence of numerous external links, with 'kleklazo.site' being a dominant host.

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://kleklazo.site/uploads/1/3/0/6/130639458/zekejafizuf-gojoxefosu.pdf
    • http://ngsprephoops.com/uploads/1/3/0/4/130483519/2200811.pdf
    • http://tagmasters.us/uploads/1/3/0/4/130477009/3db12185dbeb4af.pdf
    • http://ottawatowingpros.com/uploads/1/3/0/2/130289291/6253200.pdf
    • http://victoriaburnard.com/uploads/1/3/1/0/131069897/c1210b6f.pdf
    • http://www.the-well.net/uploads/1/3/0/9/130969974/zijigetuxijix.pdf
    • http://stillwaterarts.net/uploads/1/3/0/4/130436431/7507150.pdf
    • http://createprinting.com/uploads/1/3/0/5/130588546/jebaboroxes.pdf
    • http://tmhgrowth.com/uploads/1/3/0/8/130874129/riwogelovopose.pdf
    • http://westerngrain.net/uploads/1/3/0/4/130483591/faguro.pdf
    • http://newenglandgirlsnpl.com/uploads/1/3/0/7/130739443/surovedixe.pdf
    • http://74-123-72-131.mgwnet.com/uploads/1/3/0/8/130814020/mobugoxev.pdf
    • http://ollieprintshoppe.com/uploads/1/3/0/8/130813381/1183725.pdf
    • http://caroljensenfeltart.com/uploads/1/3/0/5/130539247/5810216.pdf
    • http://jvq1f.slpny.com/uploads/1/3/0/6/130621141/130621141.html#factors+affecting+titratable+acidity+in+raw+milk

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001185.bin
5358511def590bf6d1ea97d69072f94e6d987199588243785d21a6bda0277750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1185 8844 bytes
font_01_sfnt_off00009da2.bin
62c15eb3178098e04e989415f6b0225a93a61971ea02c78d1d6e8588d966ee80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DA2 2736 bytes

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