Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a98a888bc1b327…

MALICIOUS

PDF

108.2 KB Authoring application: QPDF
MD5: a46fde59b6471afd631202cde7c894f0 SHA-1: 1e481da59783ad2abae030bd4040759a61afcf0c SHA-256: 25a98a888bc1b3277e41a236908b4bf2abc94db8124355ebca373d3c761e491f
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a link farm and a high-confidence ML classification. The embedded content and extracted URLs indicate a phishing or redirection attempt, likely to deliver further malicious content. The primary attack pattern involves a large number of external links pointing to PDF files hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://calliecentilla.com/uploads/1/3/0/6/130639164/6317746.pdf
    • http://taurum.ch/uploads/1/3/0/7/130739615/9452157.pdf
    • http://www.sproutstationery.com/uploads/1/3/0/4/130436313/dedikowosuxeretop.pdf
    • http://electronicparking.eu/uploads/1/3/0/2/130288486/fusololisune-kisijulo.pdf
    • http://whyisurf.com/uploads/1/3/0/6/130621663/7011304.pdf
    • http://randakksdevelopment.com/uploads/1/3/0/6/130621290/valafulika-jisulod-vigegonanir-xigilulekomi.pdf
    • http://www.neuveysangle.com/uploads/1/3/0/4/130492963/zufunaxebesosiv-fisesod-kirovulukula-faxesezesilemef.pdf
    • http://mscmyservicecleaning.com/uploads/1/3/0/6/130620472/wenomokujoke.pdf
    • http://coinoplaundryparts.com/uploads/1/3/0/6/130620882/9932260.pdf
    • http://small-stuff-design.com/uploads/1/3/0/7/130776687/5099398.pdf
    • http://myveganstation.com/uploads/1/3/0/7/130776629/fetibore.pdf
    • http://calwaterforum.com/uploads/1/3/0/6/130620788/viwubedak.pdf
    • http://www.schoolsprouts.com/uploads/1/3/0/3/130313089/779500.pdf
    • http://74-123-75-164.mgwnet.com/uploads/1/3/0/5/130551335/130551335.html#mesenchymal+stem+cells+markers+flow+cytometry

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000014a4.bin
cde53719572c32ac589761bf4aff8b42c4e0f589e8d69a227e356436b30b9c11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A4 11052 bytes
font_01_sfnt_off0000d6d7.bin
ebfdde27c697884f1d39e63c5b915f1407883be1a30e95288e9c0e686e3a1773		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D7 3188 bytes

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