Malicious PDF — malware analysis report

Static analysis result for SHA-256 a718c734f25612fa…

MALICIOUS

PDF

35.6 KB Authoring application: Solid Converter PDF
MD5: 2b1983c191d306f243ad76bf8ed68203 SHA-1: bd93502710e55c4cbe0fd7189496d52654574b14 SHA-256: a718c734f25612fabcc63a6b3c747d771a752cafe807610e40937bf892ab2c8c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF files hosted on various domains. This technique, identified as a 'PDF_SEO_LINK_FARM', is often used to distribute malicious content or conduct phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the primary attack pattern involves redirecting users to a network of potentially malicious sites.

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://taylorngreene.com/uploads/1/3/0/7/130775567/vupagemuvoj_xuwodi.pdf
    • http://openedapples.net/uploads/1/3/0/8/130813834/ff2b1.pdf
    • http://mynkamorris.com/uploads/1/3/0/5/130543764/tikikidigurewed_fodinonijitu.pdf
    • http://wundrmediapro.com/uploads/1/3/0/7/130775358/xewuzowosozaf.pdf
    • http://webdisk.islandofsalvationbotanica.com/uploads/1/3/0/9/130968995/5674443.pdf
    • http://sgbelgraviavillas.com/uploads/1/3/0/9/130969685/44381.pdf
    • http://webdisk.thecouragetogrieve.com/uploads/1/3/0/5/130540211/1739a601f1a47e.pdf
    • http://aceresumes.com.au/uploads/1/3/0/5/130590583/a61da66f0866d0d.pdf
    • http://nzbriards.com/uploads/1/3/0/6/130621392/ee6cfe67312082.pdf
    • http://emblemshares.com/uploads/1/3/0/6/130639557/lifiwanoxipebud_dojuvi.pdf
    • http://joelennonframing.co.uk/uploads/1/3/0/5/130590588/mowalolekox_mazoliveparav_jubizipolaz.pdf
    • http://mtj7z.bpmtc.com/uploads/1/3/0/7/130739713/130739713.html#effects+of+acid+rain+on+historical+buildings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000334b.bin
efe1a27a7782590b6ad8806c35d238d9d21afaf07880bf9a69f77e07463db9f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x334B 8172 bytes

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