Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c985fa7409ab462…

MALICIOUS

PDF

44.3 KB Authoring application: LibreOffice Draw
MD5: d4b6db2cf80fe9e8c50205d83f188e1b SHA-1: 09db0c1b566b728f14bbccf8b3bd05e444142112 SHA-256: 5c985fa7409ab46219ed8488057cf85d157739e40c91b3140b6a6a2e001cd2d3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links to other PDF files hosted across numerous domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as flagged by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection further support its malicious nature, suggesting it's part of a phishing or SEO-based attack campaign.

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://isellthis.net/uploads/1/3/0/3/130313686/1732058.pdf
    • http://mayravaloski.com/uploads/1/3/0/8/130813135/289e1e1a6b9.pdf
    • http://americanconstructionpros.us/uploads/1/3/0/7/130739463/1113730.pdf
    • http://www.sametriaalexander.com/uploads/1/3/0/6/130621720/337886.pdf
    • http://condosurbains.ca/uploads/1/3/0/6/130620402/nireposok.pdf
    • http://www.bellasoletan.com/uploads/1/3/0/2/130272851/7449627.pdf
    • http://perthempowered.com/uploads/1/3/0/5/130590219/9b5f4060144.pdf
    • http://auroraweddingandevents.co.uk/uploads/1/3/0/5/130590462/kujavipegog-gubev-ziratamita-mixotemujivam.pdf
    • http://ashlandeducationfund.org/uploads/1/3/0/3/130379274/5952462.pdf
    • http://mangumcourtyards.com/uploads/1/3/0/3/130323342/banazukifosawikev.pdf
    • http://miguelchanonafotografo.com/uploads/1/3/0/2/130270934/9c884.pdf
    • http://golfsquamish.com/uploads/1/3/0/4/130476205/xijowab.pdf
    • http://cloneofaclone.com/uploads/1/3/0/5/130590561/nulibojurinub_wisud.pdf
    • http://olrey.com/uploads/1/3/0/4/130488704/bunifavewako-wosuzed.pdf
    • http://synapse-productions.com/uploads/1/3/0/4/130483650/37ab6f583.pdf
    • http://wherepoppiesblow.com/uploads/1/3/0/7/130776215/fb2fe8c42a891.pdf
    • http://782elm.com/uploads/1/3/0/6/130603961/7240324.pdf
    • http://www.rbtla.com/uploads/1/3/0/2/130289096/3188850.pdf
    • http://brumbleon.com/uploads/1/3/0/5/130588378/7935923.pdf
    • http://www.twistedclovertraining.com/uploads/1/3/0/6/130604281/voxapegewexe.pdf
    • http://74-123-77-82.mgwnet.com/uploads/1/3/0/4/130436180/130436180.html#draw+a+graph+that+shows+marginal+cost+average+variable+cost+and+average+total+cost
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003695.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3695 16036 bytes
font_01_sfnt_off00004daf.bin
91ca68771b208312afa849582b681969a7254a3cd2db5a4fa52a6f1528b0920e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DAF 7864 bytes

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