Malicious PDF — malware analysis report

Static analysis result for SHA-256 24967f2e1f892a2f…

MALICIOUS

PDF

35.7 KB Authoring application: Poppler-utils
MD5: 24863df61d616956c1a120a82db87ff4 SHA-1: e6de78cec9f4112a1796a9ea1fd8012120cab1ee SHA-256: 24967f2e1f892a2f5a35574de8aa3833737cdc17b9ddd1d12dcce86e711bd85a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1598.003 Subdomain Acquisition

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to URLs that are also present in the embedded link farm.

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://mrbrushgrade5.ca/uploads/1/3/0/4/130476053/lidiwomudifogogu.pdf
    • http://dde00m.site/uploads/1/3/0/5/130546183/dugadapune-sugunetus-muwazikegupu.pdf
    • http://elephanteater.org/uploads/1/3/0/2/130291649/kesutuxebuw-jigadamomo-baraga-xatofogijeloke.pdf
    • http://coordinator.co/uploads/1/3/0/5/130540868/monawubo_xilixebibib_kuvuguf.pdf
    • http://nectr.ca/uploads/1/3/0/6/130621791/tadukel.pdf
    • http://kidscreativestudio.com/uploads/1/3/0/2/130289729/dedosuxuzisala-pokirixojeb-kuvivu-kabasa.pdf
    • http://civilwarlady.org/uploads/1/3/0/6/130621100/kifidovoxagogo_rirug_digepamo.pdf
    • http://sharonostrov.com/uploads/1/3/0/8/130873708/nanotomupiwef_kavis_letaji.pdf
    • http://amayalada.com/uploads/1/3/0/5/130590371/33f1dc16.pdf
    • http://badpressnyc.com/uploads/1/3/0/4/130476485/pujosubavok.pdf
    • http://bluesmokebbq.org/uploads/1/3/0/6/130603937/seregowewavakoma.pdf
    • http://mikekelley.us/uploads/1/3/0/5/130588784/gofiditegupi_tupuki.pdf
    • http://cloudyvisionsent.com/uploads/1/3/0/4/130435650/kepabegavo-puwodivosu.pdf
    • http://www.uktsn.co.uk/uploads/1/3/0/5/130588515/libixoxuvatu.pdf
    • http://mindforyou.org/uploads/1/3/0/6/130620996/130620996.html#how+to+wind+a+bobbin+on+old+singer+sewing+machine

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032a2.bin
7377ec3cf1f566ac6f7736cbb2b47b6469c5ab4eced14a1cb49d0a9fa7f67841		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32A2 7508 bytes

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