Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e0f2814cb521e0…

MALICIOUS

PDF

36.5 KB Authoring application: Solid Converter PDF
MD5: 35a218b4d1a0b84d128562aee023a739 SHA-1: cad38a1f36e4b44129e3d4126e4a2bb080de8c6f SHA-256: 18e0f2814cb521e07e6a2f30e85dffd7f567d43a221911f279f2e69406bb9977
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content, as suggested by the 'PDF_SEO_LINK_FARM' heuristic and ClamAV detection. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence score point towards a malicious intent, likely related to phishing or malware distribution.

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://affordablevisualconcepts.com/uploads/1/3/0/8/130815726/tepefed_titura.pdf
    • http://deset.com.au/uploads/1/3/0/8/130813991/2149.pdf
    • http://dearrdesign.com/uploads/1/3/0/8/130813427/taxip.pdf
    • http://cabletvinternetonline.com/uploads/1/3/0/5/130539115/medib_sovikudelilu_figimebulebituj_wolamevuja.pdf
    • http://juanslandscapingservices.com/uploads/1/3/0/7/130738511/fetozegavera.pdf
    • http://hostmaster.creative-economy-africa.org.uk/uploads/1/3/0/7/130738988/1645412.pdf
    • http://helenbeelen.com/uploads/1/3/0/3/130313436/3574918.pdf
    • http://maridorcatering.com/uploads/1/3/0/5/130589373/5d44b.pdf
    • http://www.tumalatravelandtours.com/uploads/1/3/0/7/130775466/dupiketum.pdf
    • http://mylifehackproject.com/uploads/1/3/0/6/130603943/9279985.pdf
    • http://spokanehomefuneral.com/uploads/1/3/0/7/130738929/d47d7d6da801.pdf
    • http://wcla.nhcapcadets.org/uploads/1/3/0/5/130589145/dudixajuvem-givukogenapedi.pdf
    • http://clevelandtoybox.com/uploads/1/3/0/7/130739383/306e9f.pdf
    • http://www.mychicagorides.com/uploads/1/3/0/6/130621383/5170509.pdf
    • http://margaretrotini.com/uploads/1/3/0/6/130604949/108a732c2e.pdf
    • http://a1817133xstreamtravel.xsideas.com/uploads/1/3/0/6/130605353/130605353.html#axis+and+allies+1914+russian+revolution+rules

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003210.bin
8507a76bce716aa62760ef30412562d5b71d950e7b0af29e51dba8b8d412b325		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3210 8600 bytes

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