Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff69eae1dd090f98…

MALICIOUS

PDF

40.4 KB Authoring application: Poppler-utils
MD5: 0437890ae720e0403a49b0ea6a132d06 SHA-1: 91dd4b7795bbe54095ce89f24c534d4734c0ae78 SHA-256: ff69eae1dd090f98a555510f345f95f0c259fe0ca109a7789b450755ebc672a7
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO spam or to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body itself is heavily obfuscated and contains junk data, but the presence of numerous links suggests a delivery mechanism for further malicious content.

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://juan-jaramillo.com/uploads/1/3/0/6/130620750/jotadajunola-telonigopafofom-xuresazuxovapo-bovamiraripara.pdf
    • http://stellarosemarywalling.com/uploads/1/3/0/3/130313378/70290199ff3d513.pdf
    • http://marisabolson.com/uploads/1/3/0/5/130589009/reraneboxomunokerida.pdf
    • http://www.518titanlawncare.com/uploads/1/3/0/4/130488163/4003456.pdf
    • http://nycmarket.net/uploads/1/3/0/2/130289274/1679641.pdf
    • http://nonakaconsulting.com/uploads/1/3/0/2/130287977/videxokanukigitarus.pdf
    • http://www.iranbasecamp.com/uploads/1/3/0/3/130313524/pusuzubimavilidit.pdf
    • http://josephdefeo.net/uploads/1/3/0/3/130379061/1ba938455c87.pdf
    • http://halfmarathonrankings.com/uploads/1/3/0/3/130324158/jowewunefamo-gepovubunixo.pdf
    • http://sherwoodtreesolutions.com/uploads/1/3/0/5/130590435/8bf0f20bb5.pdf
    • http://brendanfletcher.com/uploads/1/3/0/5/130545475/69ef4a3f480207.pdf
    • http://paperearthplanners.com/uploads/1/3/0/6/130604617/zafixajuzuza.pdf
    • http://nettletonband.com/uploads/1/3/0/5/130547116/900014.pdf
    • http://nickgiamarino.com/uploads/1/3/0/6/130621220/viwovuwuwiwaxilita.pdf
    • http://comedyzoneproject.com/uploads/1/3/0/2/130289424/ee33f70d3e.pdf
    • http://southbridgewbc.devsite-1.com/uploads/1/3/0/2/130272234/130272234.html#what+countries+use+a+free+market+economy
    • http://comedyzoneproject.com/uploads/1/3/0/2/130

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004122.bin
bd5f9b14436e8100822bd8bfd4eef2d8cb5de588813e326d6b73c224afa32501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4122 9084 bytes

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